Being that cats years ago wiped out our rabbits I tryed to trap wild ones.no luck.so I got domestic ones and let loose.i have thick forsenasis then built pen.started out with 8 got a few more lost a couple.ive had 4 or more litters 4-8 in a litter.it seems like I lose 2 out of each litter.healty rabbits dead the next day flat as a pancake.no anamal injury.is that just how it is or is there something I could do.again there not sick the day before.the ones I lose are about 8 weeks old.anyway some rabbits went next door had nice litters I don't feed them there nice.up the back more rabbits took hold.now there up the barn with a new litter.there adapting to the wild.