If you breed her to another 50lb Mayday dog you can expect to get some horses out of that litter I personally don't prefer big catch weight dogs. I recently bred my small 32lb bitch to a big 50 plus pound Barracuda/Buck male and all the pups ended up falling between 40 and 45lb which was cool because once brought down in weight they will be right in the ball park im comfortable with. Now one thing i will say is that I have thought about breeding my bitch to a 31lb male but I was kind of skeptical because I didn't want to end up with a bunch of really tiny dogs lol. But I have seen dogs which seem to decrease in size with a certain degree of inbreeding Ch. Homie when bred to his daughter produced several tiny dogs and he sits around at 50 plus, Also I have noticed that Ch. Ranger dogs when inbred tight seem to throw small dogs and Ranger wasn't a small dog either, also the tight bred Gr. Ch AC stuff when inbred dogs seemed to decrease in size, although i know there are always exceptions and a lot depends on bloodlines and individual dogs, just sharing some of the examples i have seen. Ok enough of my rambling lol but i do agree with the general statement breed big dogs end up with big dogs breed small dogs end up with small dogs.

PS. I haven't been on in a while i would have liked to post the peds of the dogs mentioned seeing as how some of you may not be familiar with the dogs mentioned