Bulldogs for the most part are very healthy. The key is get a good bloodline from a reputable breeder. We have had English and Frenchies and all of ours have been very healthy. The occasional seasonal allergy will be there with some and not others, but for the most part, they are all good. Do your research, talk to people who have bought from a breeder you are thinking about, or find a rescue and there are plenty of good healthy bullies there who need a loving home.