Holland lop large litter number?

I have a pb holland lop I have bred 3 times now. first was normal size of 7 next 2 were 10-12 kits. didn't think this was possible with the small breeds - she is brood size so no peanuts. Just over a year now, Good mom but she tossed out the babies nest in the second litter because I didn't reduce number (it was over winter we lost all at nighttime, I think larger than normal wiggling mass stressed her) I had to make a hard choice to reduce the number this 3rd time to ensure healthy kits. I don't think she could nurse that many. (left 7 for her to deal with and I could manage too) just wanted to know if this is common - local show breeders of minis and hollands report much smaller litters of 5-7 max, she is from show stock, so I don't know why she has so many (we used a single mating 3rd litter, removed from bucks cage right after, she build nest in her cage the next day) Honestly even if she could raise them all it's too many for a pet litter. I do meat rabbits too but really don't want to have to cull for that with these ones. any suggestions, does this happen with brood size hollands (she is under 5 lbs but no peanuts so not a dwarf gene, so I don't get deformed ones that would die natural anyway) I thought about maybe getting an old doe that has small or doa litters to breed and help foster, but honestly don't know what's a more feasible plan, since that could potentially just end up with more kits, and I wondered about if that is ethical to breed an older doe just to be a foster mom. Im not going to hand raise - I don't want heartbreaks, since success is limited with that method, any good ideas, would be nice to hear from experienced holland breeder, please no nasty remarks about bunny breeding, I know managing litter size is a normal but not so fun part of breeding, it would be nice if she didn't have so many after all that is why I got a small one, they are supposed to have smaller litters.