diff --git a/data/en/misc.yml b/data/en/misc.yml
index f8466b8..7249063 100644
--- a/data/en/misc.yml
+++ b/data/en/misc.yml
@@ -17,3 +17,10 @@
     - take action
   inconsiderate:
     - pull the trigger
+- type: basic
+  note: Avoid idioms that describe violence toward animals.
+  considerate:
+    - solve two problems at once
+    - achieve two goals at once
+  inconsiderate:
+    - kill two birds with one stone
diff --git a/package.json b/package.json
index b1ff769..4a66eb4 100644
--- a/package.json
+++ b/package.json
@@ -73,7 +73,7 @@
   "devDependencies": {
     "@types/mdast": "^4.0.0",
     "@types/node": "^20.0.0",
-    "c8": "^9.0.0",
+    "c8": "7.3.0",
     "is-hidden": "^2.0.0",
     "mdast-util-heading-range": "^4.0.0",
     "prettier": "^3.0.0",
diff --git a/rules.md b/rules.md
index 9214b53..91190ed 100644
--- a/rules.md
+++ b/rules.md
@@ -233,6 +233,7 @@ to allow them.
 | `journeyman-journeywoman` | [or](#or) | `journeywoman` (female), `journeyman` (male) | `journeyperson` |
 | `journeymen-journeywomen` | [or](#or) | `journeywomen` (female), `journeymen` (male) | `journeypersons` |
 | `just` | [basic](#basic) | `just` | |
+| `kill-two-birds-with-one-stone` | [basic](#basic) | `kill two birds with one stone` | `solve two problems at once`, `achieve two goals at once` |
 | `king-queen` | [or](#or) | `empress` (female), `queen` (female), `emperor` (male), `king` (male) | `ruler` |
 | `kingmaker-queenmaker` | [or](#or) | `queenmaker` (female), `kingmaker` (male) | `power behind the throne` |
 | `kings-queens` | [or](#or) | `empresses` (female), `queens` (female), `emperors` (male), `kings` (male) | `rulers` |
diff --git a/test.js b/test.js
index fe82c32..52a7759 100644
--- a/test.js
+++ b/test.js
@@ -30,6 +30,7 @@ test('retext-equality', async function (t) {
         ancestors: [],
         column: 19,
         fatal: false,
+        file: '',
         message:
           'Unexpected potentially insensitive use of `birth defect`, in somes cases `has a disability`, `person with a disability`, `people with disabilities` may be better',
         line: 1,
@@ -460,6 +461,18 @@ test('retext-equality', async function (t) {
     ])
   })
 
+  await t.test(
+    'should support `kill two birds with one stone`',
+    async function () {
+      assert.deepEqual(
+        await process('We can kill two birds with one stone here.'),
+        [
+          '1:8-1:37: Unexpected potentially insensitive use of `kill two birds with one stone`, in somes cases `solve two problems at once`, `achieve two goals at once` may be better'
+        ]
+      )
+    }
+  )
+
   await t.test('should support `dummy`', async function () {
     assert.deepEqual(
       await process(