bullmastiff X lab Helping Pet Lovers Since 1999 › Forums › Dog Forums › bullmastiff X lab This topic contains 0 replies, has 1 voice, and was last updated by FurBabies20 7 years, 2 months ago. Viewing 1 post (of 1 total) Author Posts May 28 at 6:40 pm #74219 FurBabies20Participant I have a female black lab who is going to be bred to a bullmastiff. Will the puppies be to big for her? I have talked to many breeders who breed both breeds and they said it is fine. I know the first thing everyone will say is do not breed SPAY HER and i have considerd it all. But i would like some insight please Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic.