What age does a Bullmastiff generally grow until? My 2yr 3mnth old bitch still seems to be growing and gaining weight but not getting fatter! Is she still muscling up? She has been spayed so I am careful to watch her weight anyway.

Bullmastiffs are steady growers and you will find that she will get broader and deeper till
3 years old and sometimes 4 years until they mature properly.One of my girls is 5 next
January and she has broadened again the last couple of months and carries no fat just muscle.

That's good to know, thank you. Was worrying in case she was too heavy! Her dad was a broad chap so think she is taking after him!