diff --git a/migrations/archive/2022/20220309_pet_group_achievements.js b/migrations/archive/2022/20220309_pet_group_achievements.js
new file mode 100644
index 0000000000..3097e63dea
--- /dev/null
+++ b/migrations/archive/2022/20220309_pet_group_achievements.js
@@ -0,0 +1,138 @@
+/* eslint-disable no-console */
+const MIGRATION_NAME = '20220309_pet_group_achievements';
+import { model as User } from '../../../website/server/models/user';
+
+const progressCount = 1000;
+let count = 0;
+
+async function updateUser (user) {
+  count++;
+
+  const set = {
+    migration: MIGRATION_NAME,
+  };
+
+  if (user && user.items && user.items.pets) {
+    const pets = user.items.pets;
+    if (pets['FlyingPig-Base']
+      && pets['FlyingPig-CottonCandyBlue']
+      && pets['FlyingPig-CottonCandyPink']
+      && pets['FlyingPig-Desert']
+      && pets['FlyingPig-Golden']
+      && pets['FlyingPig-Red']
+      && pets['FlyingPig-Shade']
+      && pets['FlyingPig-Skeleton']
+      && pets['FlyingPig-White']
+      && pets['FlyingPig-Zombie']
+      && pets['Owl-Base']
+      && pets['Owl-CottonCandyBlue']
+      && pets['Owl-CottonCandyPink']
+      && pets['Owl-Desert']
+      && pets['Owl-Golden']
+      && pets['Owl-Red']
+      && pets['Owl-Shade']
+      && pets['Owl-Skeleton']
+      && pets['Owl-White']
+      && pets['Owl-Zombie']
+      && pets['Parrot-Base']
+      && pets['Parrot-CottonCandyBlue']
+      && pets['Parrot-CottonCandyPink']
+      && pets['Parrot-Desert']
+      && pets['Parrot-Golden']
+      && pets['Parrot-Red']
+      && pets['Parrot-Shade']
+      && pets['Parrot-Skeleton']
+      && pets['Parrot-White']
+      && pets['Parrot-Zombie']
+      && pets['Rooster-Base']
+      && pets['Rooster-CottonCandyBlue']
+      && pets['Rooster-CottonCandyPink']
+      && pets['Rooster-Desert']
+      && pets['Rooster-Golden']
+      && pets['Rooster-Red']
+      && pets['Rooster-Shade']
+      && pets['Rooster-Skeleton']
+      && pets['Rooster-White']
+      && pets['Rooster-Zombie']
+      && pets['Pterodactyl-Base']
+      && pets['Pterodactyl-CottonCandyBlue']
+      && pets['Pterodactyl-CottonCandyPink']
+      && pets['Pterodactyl-Desert']
+      && pets['Pterodactyl-Golden']
+      && pets['Pterodactyl-Red']
+      && pets['Pterodactyl-Shade']
+      && pets['Pterodactyl-Skeleton']
+      && pets['Pterodactyl-White']
+      && pets['Pterodactyl-Zombie']
+      && pets['Gryphon-Base']
+      && pets['Gryphon-CottonCandyBlue']
+      && pets['Gryphon-CottonCandyPink']
+      && pets['Gryphon-Desert']
+      && pets['Gryphon-Golden']
+      && pets['Gryphon-Red']
+      && pets['Gryphon-Shade']
+      && pets['Gryphon-Skeleton']
+      && pets['Gryphon-White']
+      && pets['Gryphon-Zombie']
+      && pets['Falcon-Base']
+      && pets['Falcon-CottonCandyBlue']
+      && pets['Falcon-CottonCandyPink']
+      && pets['Falcon-Desert']
+      && pets['Falcon-Golden']
+      && pets['Falcon-Red']
+      && pets['Falcon-Shade']
+      && pets['Falcon-Skeleton']
+      && pets['Falcon-White']
+      && pets['Falcon-Zombie']
+      && pets['Peacock-Base']
+      && pets['Peacock-CottonCandyBlue']
+      && pets['Peacock-CottonCandyPink']
+      && pets['Peacock-Desert']
+      && pets['Peacock-Golden']
+      && pets['Peacock-Red']
+      && pets['Peacock-Shade']
+      && pets['Peacock-Skeleton']
+      && pets['Peacock-White']
+      && pets['Peacock-Zombie']) {
+        set['achievements.birdsOfAFeather'] = true;
+      }
+  }
+
+  if (count % progressCount === 0) console.warn(`${count} ${user._id}`);
+
+  return await User.update({ _id: user._id }, { $set: set }).exec();
+}
+
+export default async function processUsers () {
+  let query = {
+    // migration: { $ne: MIGRATION_NAME },
+    'auth.timestamps.loggedin': { $gt: new Date('2021-08-01') },
+  };
+
+  const fields = {
+    _id: 1,
+    items: 1,
+  };
+
+  while (true) { // eslint-disable-line no-constant-condition
+    const users = await User // eslint-disable-line no-await-in-loop
+      .find(query)
+      .limit(250)
+      .sort({_id: 1})
+      .select(fields)
+      .lean()
+      .exec();
+
+    if (users.length === 0) {
+      console.warn('All appropriate users found and modified.');
+      console.warn(`\n${count} users processed\n`);
+      break;
+    } else {
+      query._id = {
+        $gt: users[users.length - 1]._id,
+      };
+    }
+
+    await Promise.all(users.map(updateUser)); // eslint-disable-line no-await-in-loop
+  }
+};