Have owned English Mastiff's in the past and do some volunteering for Mastiff Rescue. Just got a 1.5 year old bull. Never thought I would own a bull but the owners were getting up in age with health problems and they didn't have a choice but call mastiff rescue to see what they could do to help. The dog is massive they imported him from Serbia so he is a little stronger and muscular then bulls breed in the USA. He is over weight would like to see him around 150 but he has to be pushing 170 180 now. Didn't get much exercise for last 6 months when the owner hurt his back.