Raising chickens in Plano, yes or no?

I see a sub's post from around 3 years ago saying chickens are allowed, and search result online of just a very brief mention of it.

But I also thought there would be so much more posts or website results about it , if it has been going on for several years.

I guess it may mean, I'm missing some finding that says, never mind, no chickens after all, or the chicken owners are such a small percentage that it really didn't make as much nuisance as the non-chicken neighbors were thinking it would become. The link that is supposed to lead to the ordinance page is missing.

Can anyone who knows a better link to the city website or ordinance page, verify if chickens are actually allowed in general Plano residences?

Tia!