Great Dane

A man goes to a bar and he ties his Great Dane up outside. About 10 minutes later a lady comes in and asks who's Great Dane is outside. "Mine" says the man. "My dog has just killed him," she says. "What breed is your dog?" he asks. "A Chihuahua," she says. "How can a Chihuahua kill a Great Dane?" "He got caught in his throat!"

Fire Truck

A man notices a small boy wearing a fireman’s hat, sitting in a cart being pulled by his pet dog. When he gets closer he notices that the cart is tied to the dog’s testicles . “That’s a nice fire engine,” says the man. “But wouldn’t the dog pull faster if you tied the rope to his collar?” “Yes,” says the boy. “But then I wouldn’t have a siren.”

Substitution

My child doesn't eat meat, what to substitute it with?
A dog, dogs eat meat.