Does anyone know? I know there are big pet vendors out there. For example, I know for a fact that one Petco around here buys from a place called FishMart. But that's about as much as I know... Would be interesting to know more about what kinds of places Petco buys its animals from, and what the conditions are like at such places, how their breeding programs work, etc.

I'm sure this also differs depending on the area of the country.