Honestly the ordinance is written more to prevent people from owning chickens without actually banning them.

To actually own a chicken and have it be "happy" you'll want for 1 chicken per about 100 square feet of free roaming space. Then have a ratio of 1.5chickens per 100sqft. You'll also want to have them free roam in dirt or grass or actual natural flooring as it allows them to forage. Chicken coops are simply a nesting/sleeping space, nothing crazy. Some milk crates in a corner with a roof and some branches Up top to let them perch and sleep. You'll want to cut the flight feathers off to prevent them from flying away, but after a few months of feeding and providing space nesting they will always come back after a while. You can play and socialize with them enough where they will recognize you and return affection. Some people do keep chickens and hens as pets with diapers indoors too.

Biggest thing especially in the city is keeping predators away. Rats, cats, possums, raccoons all will get Into your backyard and have a feast. And with how cheap chick's are or used to be, people can carelessly keep buying more and keep feeding the rats basically.