Definitely take a look at Fauna, located at west 87th and Broadway - I absolutely love that store, and whatever they don't have in stock, they'll do a special order for you. Plus, they are conservation-oriented. Most of the livestock comes from the owner - who personally breeds most of the birds, reptiles, etc - or (for fish) from a family owned farm.
"Personally, I would be delighted if there was a life after death, especially if it permitted me to continue to learn about this world and others, if it gave me a chance to discover how history turns out." ~Carl Sagan, Cosmos
"I can't tell you how many people say they were turned off from science because of a science teacher that completely sucked out all the inspiration and enthusiasm they had for the course." ~Neil deGrasse Tyson.