Brian becomes Quagmire’s dog in the Family Guy episode “Must Love Dogs,” Season 20 Episode 3. What happens in the episodeQuagmire meets a woman named Carrie who is obsessed with dogs, so he lies and pretends he has one. He begs Brian to act like his pet; Brian agrees (for a handful of tennis balls) but then deliberately makes Quagmire’s life miserable out of spite.Carrie fills Quagmire’s house with dogs, the lie collapses, and she dumps him when she finds out he actually hates dogs and Brian isn