You can have chickens in Denver, but you have to pay $50 a head each year for them.
You can have them in Boulder
You can't have them in Longmont, but I actually live in Boulder county, so I can.
BTW, I have 50 of the Meyer Rainbow layers assortment coming in on July 1st, to sell. So if you know anybody who's looking for chicks here in CO let them know to check out my posting on Craigslist.