I am fairly new into the bulldog world but i have to say from when i first started and breed 2 litters first litter one pup died due to something fall on the pup and killed it due to POOR HOUSING! for female to whelp the pups. Second time breed some dogs one pup was missing due to POOR HOUSING! both time i used the same pen i used the aluminum fencing that the use around schools and so forth and some wood and pour a little pad for concrete slab. NOW i have an above ground pen for my female in pup so far out this is the first breeding i did and i have to say its soo much easy . I can check the pups everyday with just opening the door to the back of the pen where they are in a clean and dry enclosed area and the mom can walk outside and shit and piss and keep the area where the pups are clean. and she is happy and not stressed out . My goal is to improve more and READ! more and strive to have the best kennel environment and feeding for my dogs. Cause when i call on them for the best performance they should have no reason cause i did my BEST!!!!