My parents used to breed Berners, and yes there can be health issues. However, any reputable breeder will do their best to make sure their lines are "clean". My parents had all their dogs hips checked, and even put in the contract, that the people purchasing a puppy, had to do the same. They keep records of the hips, and any time a dog from their line gets cancer (only 3 dogs in 23 litters, over 100 dogs) or some other disease. The breed does have a shorter life-span, as do most large breeds.