Here is the full list of all 16 HEN, CHICKS AND CATS achievements.
Find 5 hen chicks
Find 10 hen chicks
Find 20 hen chicks
Find 40 hen chicks
Collect a white egg
Collect a brown egg
Collect a golden egg
Find 80 hen chicks
Chick captured by cat
Chick crushed by pig
I think cats don't like water.
Can chickens swim?
Find all the hen chicks.
Play island 16
Play island 31