Trait: Dog Person
This character has a special place in their heart for dogs. They may prefer dogs to other animals (most notably cats).
Don't apply this trait to every character that owns a dog, but only to those that express particular love and care for their pet. A person doesn't have to actually own a dog, but in that case should show their love for the species in some other way, like volunteering in an animal shelter or taking care of strays.