...People ask you why you don't want kids and you honestly answer (among other things) that you'd rather spend the time/money on your dog!

...You don't think twice about missing a final to take your dog to the vet when they split a dewclaw. >.<

...You always carry a leash and treats with you in case of wandering pups. (This has come in VERY handy)

...You have the local dog rescue's number memorized because you being them so many wandering doggies.