While the primary cause of hip dysplasia is genetics, there are things that do cause it to happen and aggrevate it that are not genetic.

A puppy who grows to fast can end up with hip problems. Usually this occurs in larger breeds. Injury is another reason for hip problems. As a general rule, I do not let my dogs (Golden Retrievers) jump until they are 2 years old. I see more and more where people get their dogs involved in agility and advanced obedience and jump the dogs over high jumps and broad jumps on a regular basis. The bone is still soft and pliable until they are around 2 years old so why are they doing this??? I try to tell people not to but they don't see the harm.

The OFA (orthepedic foundation for animals) will not certify a dog's hips until they are 2 for this very reason.

The other thing is puppies who grow to fast for their breed. Some dog manufacturers are now making large breed formula becuase they recognize the problems of giving too much fat content to larger dogs which makes them grow too fast. I personally take my dogs off the richer puppy foods at around 4 months. I am not saying that everyone should do this. Only dogs who are growing too fast and are extremely leggy. By getting them on an adult food (but giving them puppy rations) you are ensuring the essential nutrients but cutting back on the extra fat content.

In short to answer your question.... yes your husband may be playing too rough on the dog if he is putting undo stress on his hips in any way. If he is playing rough without putting stress on the hips then you are probably looking at a genetic thing. Genetics play a great deal with hip problems in addition to the injury or growing issues.