I have an 14 weeks pug, my mum has a 2 year old bullmastiff, the bull mastiff is a very kind dog but when with the puppy is too rough. She often rolls on top of the pup and paws him very hard often pushing him across the room... Both tails are wagging and the pup often submits. Any one have any advice on a better introduction method?
Maybe try a leash or to introduce the pug hold it around the bullmastiff to let it sniff the pug or the other opption is in this case the bullmastiff is only trying to show dominence to the pug. These are the options I can think of.