So my collection is growing and I would like to set up a rat collony. I plan on starting small with 5 females and 2 males. I've been looking at the different stickies and I now realize I'll need to let everyone rest once the babies have been weaned, so I'll have a couple weeks were I'll be feeding f/t which is fine with me as I prefer that. I know time will come to 'retire' breeders and possibly have to pick up new ones. I have a local breeder that has rats available and is cool with me using their rats to breed. I've looked at a lot of builds for racks and I have some ideas on which ones I'll be taking plans from.
Now my questions, is it ok to interbreed rats or will I be dealing with a mess of issues? If it's ok how often should I introduce new blood? The containers I'm looking at are around 20"*27" is that big enough for a mom and her babies? If you can think of other important facts that I haven't thought of let me know.
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