>>I am setting up my colony at this point. I am probably going with atleast 1 rack setup with 10 tubs.

>>

>>My question would be do most people that breed have some sort of system that allows them to raise up the younger offspring, kill off the older adults, and use the younger offspring that are being raised to continue to keep the colony numbers at the minimum levels or even grow?



When I need older rats I just wean them as usual but, instead of freezering them I put them in a tub to grow them up a bit. It doesn't take that long to get them to good medium size and I think is more efficient than taking them to larges in months. I wouldn't reset a breeding group each time or you are wasting experienced breeders that will do a better job. I do retire my breeders to the freezer, but only when it is time and I already have a group reproducing to replace them. Otherwise you get all sorts of lag time that is not worth waiting out.
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Sonya

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