Oh they're totally bad for my health. Winter is constantly head butting me while trying to give me a kiss. Smudge occasionally walks over me knocking the wind out of me. I constantly trip over Smudge and the odd time Winter while running agility...true it's not always the dogs fault...I'm just a klutz. The biggest health risk I've ever gotten from the dogs though would have to be from the smallest dog in the house. Yes that's right Tama, I got a concusion attempting to stop him from being squashed.