diff --git a/frontend/src/components/ExperimentCalendar.jsx b/frontend/src/components/ExperimentCalendar.jsx
index 33dbe2e..ea058e6 100644
--- a/frontend/src/components/ExperimentCalendar.jsx
+++ b/frontend/src/components/ExperimentCalendar.jsx
@@ -3,54 +3,91 @@ import {
   format, startOfMonth, endOfMonth, eachDayOfInterval,
   getDay, addMonths, subMonths,
 } from 'date-fns';
+import {
+  ResponsiveContainer, BarChart, Bar, XAxis, YAxis,
+  CartesianGrid, Tooltip, Legend,
+} from 'recharts';
 import { experimentsApi } from '../api/client';
 import Modal from './ui/Modal';
+import DailyStatusForm from './DailyStatusForm';
 
-// ── Day detail panel rendered inside modal ─────────────────────────────────────
+const BUILTIN_KEYS_SET = new Set(['experiment_description', 'vitals', 'treatment', 'notes']);
 
-function DayDetail({ statuses, animals, template }) {
-  const animalMap = useMemo(
-    () => Object.fromEntries(animals.map((a) => [a.id, a])),
-    [animals],
-  );
+function SubjectReadOnly({ status, template }) {
   const activeFields = template.filter((f) => f.active);
-
-  function getVal(status, field) {
-    if (field.builtin) return status[field.key];
-    return status.custom_fields?.[field.fieldId];
+  function getVal(s, f) {
+    if (f.builtin) return s[f.key];
+    return s.custom_fields?.[f.fieldId];
   }
+  const nonEmpty = activeFields.filter((f) => {
+    const v = getVal(status, f);
+    return v !== null && v !== undefined && String(v).trim() !== '';
+  });
+  if (nonEmpty.length === 0) return <p className="text-xs text-gray-400">No field values recorded.</p>;
+  return (
+    <div className="grid grid-cols-1 sm:grid-cols-2 gap-x-6 gap-y-1">
+      {nonEmpty.map((f) => (
+        <div key={f.fieldId ?? f.key} className="text-sm">
+          <span className="text-gray-500 font-medium">{f.label}:</span>{' '}
+          <span className="text-gray-900 whitespace-pre-wrap">{String(getVal(status, f))}</span>
+        </div>
+      ))}
+    </div>
+  );
+}
 
-  if (statuses.length === 0) {
-    return <p className="text-gray-500 text-sm py-2">No data recorded for this day.</p>;
-  }
+function DayPanel({ date, animals, allStatuses, template, experimentId, onStatusChange, onStatusCreate }) {
+  const dateStr = format(date, 'yyyy-MM-dd');
+  const [editingAnimalId, setEditingAnimalId] = useState(null);
+
+  const statusByAnimal = useMemo(() => {
+    const map = {};
+    allStatuses.forEach((s) => {
+      if (s.date.slice(0, 10) === dateStr) map[s.animal_id] = s;
+    });
+    return map;
+  }, [allStatuses, dateStr]);
 
   return (
-    <div className="space-y-3 max-h-[60vh] overflow-y-auto pr-1">
-      {statuses.map((status) => {
-        const animal = animalMap[status.animal_id];
-        const nonEmptyFields = activeFields.filter((f) => {
-          const v = getVal(status, f);
-          return v !== null && v !== undefined && String(v).trim() !== '';
-        });
+    <div className="space-y-3 max-h-[70vh] overflow-y-auto pr-1">
+      {animals.map((animal) => {
+        const existing = statusByAnimal[animal.id];
+        const isEditing = editingAnimalId === animal.id;
         return (
-          <div key={status.id} className="bg-gray-50 rounded-xl p-4 border border-gray-100">
-            <div className="font-semibold text-gray-900 mb-2 text-sm">
-              {animal?.animal_name ?? 'Unknown subject'}
-              {animal?.animal_id_string && (
-                <span className="ml-2 text-gray-400 font-normal">· {animal.animal_id_string}</span>
+          <div key={animal.id} className="bg-gray-50 rounded-xl p-4 border border-gray-100">
+            <div className="flex items-center justify-between mb-2">
+              <div className="font-semibold text-gray-900 text-sm">
+                {animal.animal_name ?? 'Unknown subject'}
+                {animal.animal_id_string && (
+                  <span className="ml-2 text-gray-400 font-normal">· {animal.animal_id_string}</span>
+                )}
+              </div>
+              {!isEditing && (
+                <button
+                  type="button"
+                  onClick={() => setEditingAnimalId(animal.id)}
+                  className="text-xs text-blue-600 hover:text-blue-800 border border-blue-200 rounded px-2 py-0.5 hover:bg-blue-50 transition-colors"
+                >
+                  {existing ? 'Edit' : '+ Add'}
+                </button>
               )}
             </div>
-            {nonEmptyFields.length === 0 ? (
-              <p className="text-xs text-gray-400">No field values recorded.</p>
+            {isEditing ? (
+              <DailyStatusForm
+                animalId={animal.id}
+                experimentId={experimentId}
+                template={template}
+                existing={existing ? { ...existing, date: dateStr } : undefined}
+                onSuccess={(saved) => {
+                  if (existing) { onStatusChange(saved); } else { onStatusCreate(saved); }
+                  setEditingAnimalId(null);
+                }}
+                onCancel={() => setEditingAnimalId(null)}
+              />
+            ) : existing ? (
+              <SubjectReadOnly status={existing} template={template} />
             ) : (
-              <div className="grid grid-cols-1 sm:grid-cols-2 gap-x-6 gap-y-1">
-                {nonEmptyFields.map((field) => (
-                  <div key={field.fieldId ?? field.key} className="text-sm">
-                    <span className="text-gray-500 font-medium">{field.label}:</span>{' '}
-                    <span className="text-gray-900 whitespace-pre-wrap">{String(getVal(status, field))}</span>
-                  </div>
-                ))}
-              </div>
+              <p className="text-xs text-gray-400">No data recorded for this day.</p>
             )}
           </div>
         );
@@ -59,65 +96,69 @@ function DayDetail({ statuses, animals, template }) {
   );
 }
 
-// ── Main calendar component ────────────────────────────────────────────────────
-
-export default function ExperimentCalendar({ experimentId, template, allStatuses, animals }) {
+export default function ExperimentCalendar({ experimentId, template, allStatuses, animals, onStatusChange, onStatusCreate }) {
   const [currentMonth, setCurrentMonth] = useState(() => new Date());
   const [selectedField, setSelectedField] = useState(null);
   const [calendarDays, setCalendarDays] = useState({});
   const [loading, setLoading] = useState(false);
   const [selectedDate, setSelectedDate] = useState(null);
 
-  // Build field options from active template fields
   const fieldOptions = useMemo(
-    () =>
-      template
-        .filter((f) => f.active)
-        .map((f) => ({
-          value: f.builtin ? f.key : f.fieldId,
-          label: f.label,
-        })),
+    () => template.filter((f) => f.active).map((f) => ({ value: f.builtin ? f.key : f.fieldId, label: f.label })),
     [template],
   );
 
-  // Default: first field whose label contains "weight", else first active field
   useEffect(() => {
     if (fieldOptions.length === 0 || selectedField) return;
-    const weightField = fieldOptions.find((f) =>
-      f.label.toLowerCase().includes('weight'),
-    );
-    setSelectedField(weightField ? weightField.value : fieldOptions[0].value);
+    const weightField = fieldOptions.find((f) => f.label.toLowerCase().includes('weight'));
+    setSelectedField(weightField ? weightField.value : fieldOptions[0]?.value ?? null);
   }, [fieldOptions]); // eslint-disable-line react-hooks/exhaustive-deps
 
-  // Fetch calendar counts whenever field changes
   useEffect(() => {
     if (!selectedField) return;
-    let cancelled = false;
-    setLoading(true);
-    experimentsApi
-      .getCalendar(experimentId, selectedField)
-      .then((data) => { if (!cancelled) setCalendarDays(data.days ?? {}); })
-      .catch(() => { if (!cancelled) setCalendarDays({}); })
-      .finally(() => { if (!cancelled) setLoading(false); });
-    return () => { cancelled = true; };
-  }, [experimentId, selectedField]);
+    const isBuiltin = BUILTIN_KEYS_SET.has(selectedField);
+    const days = {};
+    allStatuses.forEach((s) => {
+      const val = isBuiltin ? s[selectedField] : s.custom_fields?.[selectedField];
+      if (val !== null && val !== undefined && String(val).trim() !== '') {
+        const key = s.date.slice(0, 10);
+        days[key] = (days[key] || 0) + 1;
+      }
+    });
+    setCalendarDays(days);
+  }, [allStatuses, selectedField]);
 
-  // Build the grid: leading empty cells + each day of the month
   const monthStart = startOfMonth(currentMonth);
   const monthEnd   = endOfMonth(currentMonth);
   const days       = eachDayOfInterval({ start: monthStart, end: monthEnd });
-  const leadingPad = getDay(monthStart); // 0 = Sunday
+  const leadingPad = getDay(monthStart);
 
-  // Statuses filtered to the selected day
-  const selectedDayStatuses = useMemo(() => {
-    if (!selectedDate) return [];
-    const key = format(selectedDate, 'yyyy-MM-dd');
-    return allStatuses.filter((s) => s.date.slice(0, 10) === key);
-  }, [selectedDate, allStatuses]);
+  const barData = useMemo(() => {
+    if (!selectedField) return [];
+    const isBuiltin = BUILTIN_KEYS_SET.has(selectedField);
+    return animals
+      .map((animal) => {
+        const statuses = allStatuses.filter((s) => s.animal_id === animal.id);
+        const total = statuses.length;
+        const success = statuses.filter((s) => {
+          const val = isBuiltin ? s[selectedField] : s.custom_fields?.[selectedField];
+          return val !== null && val !== undefined && String(val).trim() !== '';
+        }).length;
+        return {
+          name: animal.animal_name || animal.animal_id_string || animal.id.slice(0, 8),
+          total,
+          success,
+          failure: total - success,
+          pct: total > 0 ? Math.round((success / total) * 100) : 0,
+        };
+      })
+      .filter((d) => d.total > 0);
+  }, [animals, allStatuses, selectedField]);
 
   return (
-    <div className="bg-white rounded-xl border border-gray-200 p-5 shadow-sm">
-      {/* Controls */}
+    <div className="bg-white rounded-xl border border-gray-200 p-5 shadow-sm mt-6">
+      <h3 className="text-base font-semibold text-gray-900 mb-4">Daily Record Calendar</h3>
+
       <div className="flex flex-wrap items-center gap-3 mb-5">
         <span className="text-sm text-gray-600 font-medium">Count by field:</span>
         <select
@@ -127,51 +168,28 @@ export default function ExperimentCalendar({ experimentId, template, allStatuses
           onChange={(e) => setSelectedField(e.target.value)}
           disabled={fieldOptions.length === 0}
         >
-          {fieldOptions.map((f) => (
-            <option key={f.value} value={f.value}>{f.label}</option>
-          ))}
+          {fieldOptions.map((f) => <option key={f.value} value={f.value}>{f.label}</option>)}
           {fieldOptions.length === 0 && <option value="">No fields configured</option>}
         </select>
-        {loading && (
-          <span className="text-xs text-gray-400" aria-live="polite">Loading…</span>
-        )}
+        {loading && <span className="text-xs text-gray-400" aria-live="polite">Loading...</span>}
       </div>
 
-      {/* Month navigation */}
       <div className="flex items-center justify-between mb-4">
-        <button
-          aria-label="Previous month"
-          onClick={() => setCurrentMonth((m) => subMonths(m, 1))}
-          className="p-2 rounded-lg hover:bg-gray-100 text-gray-500 text-lg leading-none"
-        >
-          ‹
-        </button>
-        <h3 className="font-semibold text-gray-900 text-base">
-          {format(currentMonth, 'MMMM yyyy')}
-        </h3>
-        <button
-          aria-label="Next month"
-          onClick={() => setCurrentMonth((m) => addMonths(m, 1))}
-          className="p-2 rounded-lg hover:bg-gray-100 text-gray-500 text-lg leading-none"
-        >
-          ›
-        </button>
+        <button aria-label="Previous month" onClick={() => setCurrentMonth((m) => subMonths(m, 1))}
+          className="p-2 rounded-lg hover:bg-gray-100 text-gray-500 text-lg leading-none">&#8249;</button>
+        <span className="font-semibold text-gray-900 text-base">{format(currentMonth, 'MMMM yyyy')}</span>
+        <button aria-label="Next month" onClick={() => setCurrentMonth((m) => addMonths(m, 1))}
+          className="p-2 rounded-lg hover:bg-gray-100 text-gray-500 text-lg leading-none">&#8250;</button>
       </div>
 
-      {/* Day-of-week headers */}
       <div className="grid grid-cols-7 mb-1">
-        {['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'].map((d) => (
-          <div key={d} className="text-center text-xs font-medium text-gray-400 py-1 select-none">
-            {d}
-          </div>
+        {['Sun','Mon','Tue','Wed','Thu','Fri','Sat'].map((d) => (
+          <div key={d} className="text-center text-xs font-medium text-gray-400 py-1 select-none">{d}</div>
         ))}
       </div>
 
-      {/* Calendar grid */}
       <div className="grid grid-cols-7 gap-1">
-        {Array.from({ length: leadingPad }).map((_, i) => (
-          <div key={`pad-${i}`} />
-        ))}
+        {Array.from({ length: leadingPad }).map((_, i) => <div key={`pad-${i}`} />)}
         {days.map((day) => {
           const dateStr = format(day, 'yyyy-MM-dd');
           const count   = calendarDays[dateStr] ?? 0;
@@ -184,39 +202,60 @@ export default function ExperimentCalendar({ experimentId, template, allStatuses
               onClick={() => setSelectedDate(day)}
               className={[
                 'relative flex flex-col items-center justify-center rounded-lg py-1.5 min-h-[2.75rem] text-sm select-none transition-all',
-                hasData
-                  ? 'bg-blue-50 border border-blue-200 hover:bg-blue-100 cursor-pointer'
-                  : 'text-gray-300 cursor-default',
+                hasData ? 'bg-blue-50 border border-blue-200 hover:bg-blue-100 cursor-pointer' : 'text-gray-300 cursor-default',
               ].join(' ')}
             >
-              <span className={hasData ? 'font-semibold text-blue-900 text-xs' : 'text-xs'}>
-                {day.getDate()}
-              </span>
+              <span className={hasData ? 'font-semibold text-blue-900 text-xs' : 'text-xs'}>{day.getDate()}</span>
               {hasData && (
-                <span
-                  data-testid={`count-${dateStr}`}
-                  className="text-[10px] leading-none font-bold text-blue-600 mt-0.5"
-                >
-                  {count}
-                </span>
+                <span data-testid={`count-${dateStr}`} className="text-[10px] leading-none font-bold text-blue-600 mt-0.5">{count}</span>
               )}
             </button>
           );
         })}
       </div>
 
-      {/* Day detail modal */}
+      {barData.length > 0 && (
+        <div className="mt-8">
+          <h4 className="text-sm font-semibold text-gray-700 mb-3">
+            Field completeness by subject
+            {fieldOptions.find((f) => f.value === selectedField) && (
+              <span className="ml-2 font-normal text-gray-400">
+                — {fieldOptions.find((f) => f.value === selectedField).label}
+              </span>
+            )}
+          </h4>
+          <ResponsiveContainer width="100%" height={220}>
+            <BarChart data={barData} margin={{ top: 4, right: 16, left: 0, bottom: 4 }}>
+              <CartesianGrid strokeDasharray="3 3" stroke="#f0f0f0" />
+              <XAxis dataKey="name" tick={{ fontSize: 11 }} />
+              <YAxis tick={{ fontSize: 11 }} allowDecimals={false} />
+              <Tooltip />
+              <Legend wrapperStyle={{ fontSize: 11 }} />
+              <Bar dataKey="total" name="Total" fill="#94a3b8" radius={[3,3,0,0]} />
+              <Bar dataKey="success" name="Success" fill="#22c55e" radius={[3,3,0,0]} />
+              <Bar dataKey="failure" name="Failure" fill="#f87171" radius={[3,3,0,0]} />
+            </BarChart>
+          </ResponsiveContainer>
+          <div className="mt-2 flex flex-wrap gap-4">
+            {barData.map((d) => (
+              <span key={d.name} className="text-xs text-gray-500">
+                <span className="font-medium text-gray-700">{d.name}</span>: {d.pct}% complete
+              </span>
+            ))}
+          </div>
+        </div>
+      )}
+
       {selectedDate && (
-        <Modal
-          isOpen={!!selectedDate}
-          onClose={() => setSelectedDate(null)}
-          title={format(selectedDate, 'MMMM d, yyyy')}
-          size="lg"
-        >
-          <DayDetail
-            statuses={selectedDayStatuses}
+        <Modal isOpen={!!selectedDate} onClose={() => setSelectedDate(null)} title={format(selectedDate, 'MMMM d, yyyy')} size="lg">
+          <DayPanel
+            date={selectedDate}
             animals={animals}
+            allStatuses={allStatuses}
             template={template}
+            experimentId={experimentId}
+            onStatusChange={(updated) => { onStatusChange?.(updated); setSelectedDate(null); }}
+            onStatusCreate={(created) => { onStatusCreate?.(created); setSelectedDate(null); }}
           />
         </Modal>
       )}
diff --git a/frontend/src/pages/ExperimentDetail.jsx b/frontend/src/pages/ExperimentDetail.jsx
index f429ae7..ecab307 100644
--- a/frontend/src/pages/ExperimentDetail.jsx
+++ b/frontend/src/pages/ExperimentDetail.jsx
@@ -269,7 +269,7 @@ export default function ExperimentDetail() {
           <div className="flex items-center gap-3 mb-3 flex-wrap">
             {/* Mode toggle */}
             <div className="flex rounded border border-gray-200 overflow-hidden text-xs">
-              {[['list', 'List'], ['group', 'Group'], ['calendar', 'Calendar']].map(([mode, label]) => (
+              {[['list', 'List'], ['group', 'Group']].map(([mode, label]) => (
                 <button key={mode} type="button" onClick={() => updateDisplayMode(mode)}
                   className={`px-3 py-1 border-l border-gray-200 first:border-l-0 transition-colors
                     ${displayMode === mode ? 'bg-gray-700 text-white' : 'bg-white text-gray-500 hover:bg-gray-50'}`}>
@@ -357,14 +357,6 @@ export default function ExperimentDetail() {
             );
           })}
 
-          {displayMode === 'calendar' && (
-            <ExperimentCalendar
-              experimentId={id}
-              template={dailyTemplate}
-              allStatuses={experimentStatuses}
-              animals={animals}
-            />
-          )}
         </>
       )}
 
@@ -375,6 +367,23 @@ export default function ExperimentDetail() {
         dailyTemplate={dailyTemplate}
       />
 
+      {animals.length > 0 && (
+        <ExperimentCalendar
+          experimentId={id}
+          template={dailyTemplate}
+          allStatuses={experimentStatuses}
+          animals={animals}
+          onStatusChange={(updated) => {
+            setExperimentStatuses((prev) =>
+              prev.map((s) => (s.id === updated.id ? updated : s))
+            );
+          }}
+          onStatusCreate={(created) => {
+            setExperimentStatuses((prev) => [...prev, created]);
+          }}
+        />
+      )}
+
       <AuditLogSection tableName="animals" limit={5} />
 
       {/* Template editor modal */}