Right now, I have two breeding pair of RTBs. They won't be up to breeding weight for another couple of years or so, plenty of time for me to get some more room. But I really don't plan on expanding that large. I want to keep two or three from each litter, and will probably add another one or two to the cycle depending... but nothing huge. And even if I have four or five breeding pairs, I will probably only breed one or two at a time. I don't want to overload myself... it's just me here, for the moment. But, you never know what the future might hold!