I have herd they do have a tendency to slow down in growth i forget where i saw this table cart on the growth of an ABF, not sure how accurate it is but i will sure try to find it for you tomorrow or you can try to Google it you have to figure they say they live to about 20 years old i am sure they do not grow to full size in a couple of years you know.

Have a good night

Timmy Z'
Wicked Frogs