Mastiff Forum:
Proper size for female

Our Sydney (female, turing 3 years old in June) is lean and were wondering if its OK because we want to breed her. You see Sydneys mother was over 200 lbs, but Sydney is only 130 lbs now and hasnt really gained much in the last 6 months. Otherwise shes in great health and has a wonderful temperament. Any insights you experts could offer would be helpful.

I would suggest doing research on the AKC standards and maybe joining a club. Please think before breeding.