When you go to Petco/Petsmart to buy your dog a bone or bag of cookies "Just because"
When you take as many (or more) pictures of your dogs as your own kids/young relatives
When "I'm sorry, I have to take the baby to potty" means "My dog needs to be let out to pee."
When you decline going out with friends because your baby is sick...and it's the big hairy one with the kennel in the corner of your bedroom x.x