I keep my mice and rats with 1.2.variable The rats have no problems. I actually notice that the older babies will be cleaning the younger ones. I currently have 18 day pups and 5 day pups in the same tub. With the one of the females ready to drop again.



All the females seem to share the duties. I leave my males in, and have had no problems. Again the older pups seem to play with the males.



I agree with the post above, I tend to see spats mostly when one is getting ready to drop. I set my groups up at a young age. From then on they are together. I used to seperate between breedings but found it wasnt needed.



Mice on the other hand are a pain in the butt. The older pups will kill all the pinks of another group. So i normally seperate them at a very early stage.



All being said there are acceptions to every rule and you will, like everyone else, have different observations. I find my best rule of thumb is to read my animals and thier needs. Things are always changing.



Take Care and ignore my typo's

James

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