Other contributors have said "How big should your amstaff x american pitbull be at 9mths?" is the same question as "How big should your mastiff x American pitbull be at 9mths?" If you believe that these are not asking the same thing and should be answered differently, click here
How big should your mastiff x American pitbull be at 9mths?
if its a English mastiff male cross with a female pitbul of good quality, then we can expect a 30inch for the new breed. and it will carry the activeness of the pitbul
American Bulldogs are not illegal in the UK, but if someone decided that she was a Pitbull "type" then she could be taken away and destroyed and you could be fined.
A mastiff , or a bullmastiff, and I presume you mean terrier, and why do you need to know, as you know dog fighting is illegal. Maybe you would like to reconsider these questions.
If the mother is the Old English Mastiff then the puppies would be bigger than if the American Bulldog was the mother.
If the English Mastiff was the mother then I would say that they could be...
The average weight of the full grown mastiff, is quite big! Height: 27-30 in. to the shoulder of the dog Weight: 120-250 lbs. Note: Some mastiffs can weigh less or weigh more, or can be taller or...