Female Feline, Male Mutt/Playing With

Basic Trope: A dog will be male, a cat will female, and their owners will often be the same gender.
 * Straight: Fluffy is a sassy, snarky female cat owned by Alice. Fido is a male Big Friendly Dog owned by Bob.
 * Exaggerated: Cats and dogs are shown to be a One-Gender Race, all female and all male respectively.
 * Downplayed: Fluffy is female and Fido is male, but other than that they mostly don't adhere to the stereotypes.
 * Justified: Alice is a cat person, Bob is a dog person, and they simply feel more comfortable with a pet the same gender.
 * Inverted: Fifi is a female dog owned by Alice and Max is a male cat owned by Bob.
 * Subverted: Tom the male cat joins Fluffy and Fido.
 * Double Subverted: Then Tom gets pregnant.
 * Parodied: Alice is a Straw Feminist who will not have any pet but a female cat.
 * Zig Zagged: ???
 * Averted: There are many cats and dogs in the cast and they are of varying genders.
 * Enforced:
 * The author has a thing for Cat Girls, and makes the dog a male so he can be the Idiot Hero.
 * The publisher wants the dog to be male to avoid B-word jokes, thereby keeping the work family-friendly.
 * Lampshaded: "Oh Fluffy, I just love your feminine feline wit."
 * Invoked: The series plays all the Animal Stereotypes straight or exaggerated.
 * Exploited: Fido is a Lovable Sex Maniac who loves female cats, and visits human women's homes first to find them.
 * Defied: Alice hates cats and Bob hates dogs.
 * Discussed: "Is it hard for you cat ladies to deal with oafish dog men?"
 * Conversed: "Hey Carl, ever notice how the cat is always a girl and the dog is always a guy?"