how old is she in those pictures, and how much did she weigh then?
in my experience, which is barely existent, my puppy grew until like 5 months, and then stopped. She has gotten a bit taller but no weight gain. mine is a mix of something as well. APBT
's do not reach full size until about 2 years old though. they go through fazes of normal growth, then height, then bulk, all at different times.
I have read, on here, that they grow normally for the first 7-14 months, and then they stop growing height wise for the most part and just start bulking out until around 24 months.