Calculating Feeding Amount

[Mink]

I know this is very delayed, life has been busy and my pc was down for quite a while too.

It would depend on what your interpretation of 'adult size' is I suppose.
I mean, GSDs generally stop growing around 2 years old, but the 2nd year is mostly filling out... so somewhere between 1 to 2 years I would say. Just depends on when you think your dog has slowed way down or completely stopped growing.

I'm sure you've figured it out by now, but just visited this post and felt very odd leaving a loose end. ^_^