i don't keep any record on the rodents. I do take he baby asf and mix them up ( while they are still nursing ) when I change their bedding ( place all 3 tub worht of babies into a large tubaware container, count them and then divide the babies uo among the 3 tanks. Then I take the larger males asf out and feed them off to the snakes so I can try and keep as wide of a mix gene pool as possible.. Sadly this seems to have all but removed the ablino asf from my colonies since they were so few in numbers..