Most do if they are in stock, but I would not at all recommend getting any bird from petco, because their birds tend to be vicious from staying in cages to long with out any human interaction. So if your looking for a bird that is nice and fun, I would get one from a breeder.

Most petcos actually do not have cockatiels. It is a common pet bird, but you should get one a a pet shp that takes better care if them. Thanks