19 month old male Bull Mastiff 180lbs

I have a male 19 month old Bull Mastiff DOB 5/2/21. His name is Bosco. Well behaved and has been raised with children from babies to teens. Gets along with cats and chickens. Being a dominant male breed other dogs especially male are unknown of how he would be. But if introducing is done correctly I would not see a problem. But I can’t guarantee. He is leash and house trained…not a destructive dog..out of his puppy stage even then he was great. He is naturally protective but not aggressive. He loves people but if someone got physical he would not let it happen. He is extremely strong…even though he behaves on a leash..if he decides to play or run..you have to be strong enough not to go yard skiing. My health is not real good and he was going to be trained as a mobility dog..he was doing great. But I have to move in with my daughter and things have changed. He truly is a great dog..great watch dog and definitely will make you feel safe.