Supervise your new dog's outdoor time. Make sure he has lots of fresh water and shade. Mastiff dogs can get heat stroke if precautions are not taken. Other dangers to young pups left unobserved outdoors include theft, attacks from other animals, and chewing or swallowing something other than his food or approved toys. When buying your pet chew toys, check to see that he can't chew it into pieces that could be swallowed. Foreign bodies in his intestine could necessitate surgery to remove them, putting your dog's life in danger.
Mastiff - Dog Lover