Rabbits

Diet: Quality hay, grass, or mleafy greens such as lettuce, cabbage, etc.

Rabbits like to live together in groups and make very social and carefree creatures.
Carrots are actually not a natural part of a rabbit's diet and can upset their stomach if consumed too frequently.
Rabbits can be easily taught tricks and commands similiar to how dogs can be trained.
Rabbits can perform tricks and leaps called a "binky" where they twist and kick while in mid-air.
Depending on the rarity of the breed, situation of the rabbit, and bloodline, Rabbits range from $5-$100.