Yes they do Hear, Cancer , Bloat. Hip's, elbows and about 5 other majore thing's .. you get what you pay for in this breed... Find one that has been a code of ethic's breedes and Test's there DDB's.. and it's not Mange it is Demadetrice Mites that some have in there rappid groth there switch from Mom's Emune system to there own they get out of hand and you will get hair loss in spot's.. it's not contages every Mammal has them even humans but easy to fix ...PS. these dogs will cost you in food and vet's and flea tick hart worm once a month and depending on what you feed 1,500 to 3 or 4 thousand a year.. we feed raw and feed 80lbs of raw a month on our DDB's there Estate Dog's there mastif there expensive and a puppy should be 2,ooo.oo and up or stay away from them... REALITY....
Answered by Anonymous - 2/18/2012 4:01:30 PM