I have to agree with Jeff on this one, selling your animals is no way to make money. Even if you do get what you paid on the animals you don't get back the money you've spent on them since you got them.
Liquidating assets should only ever be done in a situation where you've run out of options as far as borrowing money or just riding out being broke for a while. If you need to eat today and have no other way of buying groceries that's when you sell something to get by but other than that it amounts to throwing money away when you consider the investment value of the animals in question.
I've been in enough financial trouble to have the same thoughts that you're having but I've always, somehow, managed to hang on to my animals. Hopefully you'll work it out and get to keep your collection and breed it out.
I feel a little light headed... maybe you should drive...