I want to eat my family's pet chickens
Why do you want to eat the chickens?
Chicken is delicious.
Your family are obviously attached to those chickens, since they are raising them as pets, so you shouldn't harm them. It is wrong to take anyone's property, especially a pet that is practically part of their family.
I'd eat a dog if I could. I can't stand pets in general.
You should love pets not harm them. Even a dog, that seems so sad. Why do you have a problem with pets?