Better Farm gives pigs curly tails and snouts, makes chickens plumper, and adds face and body detail to cows and sheep. These custom animal shapes only load through OptiFine. If your plants look 3D but your animals look unchanged, work through this list.
Make sure OptiFine is running
1. On the title screen, check that your game is launching with OptiFine. The OptiFine version text in the corner of the main menu is a quick sign.
2. Open Options → Video Settings. If you see OptiFine's extra sections, such as Quality, Details and Shaders, it is loaded.
3. If those sections are not there, you are on plain vanilla. Switch to your OptiFine profile in the launcher and start the game again.
Check OptiFine's model setting
1. Go to Video Settings → Quality.
2. Find Custom Entity Models and make sure it is ON.
3. Click Done. Then reload resources with F3 + T, or toggle the pack off and on in Resource Packs.
Still not working?
- Open Resource Packs and move Better Farm to the top of the Selected list. Another pack that changes animals may be overriding it.
- Turn off other packs one at a time to find the conflict.
- Look at a pig up close. Its curly tail and snout are the easiest changes to spot.