Well this is happening on repeat in my house i keep my females 2 to a tub and throw a male in there to breed them .. now the past 3 times I have had 1 girl lay 10+ and the other lay 5 or less .. now 2 out of the 3 where 1st time moms and the the other this way her second time dropping but the 1st litter she dropped was like 13 or 14 but she abandoned the litter and they all died within days that was her 1st litter .. she m othered all the 2nd litter but was only 5 .. so can anyone tell me y the litters are so different?

I got 4 breedi g right now 2 should drop within the next week or so .. so ill let u know the numbers of them as well and these are all 1st time mom's as well