Here is the full list of all 20 ANIMAL WELL achievements.
Sneak up on a squirrel
Get crushed by a chinchilla
Leave the well
Find all secret eggs
Light all candles
Pop 1000 bubbles
Find 32 secret eggs
Find a secret rabbit
Release the Manticore
Find the G. flame
Find the P. flame
Find the B. flame
Find 16 secret eggs
Find another way to get around
Find 8 secret eggs
Find a new way to get around
Find the V. flame
Find a different way to get around
Find the map
Find a secret egg