Estimating adult size

[Sanhestar]

as you said, there are many factors that influence the final height of a goat. I personally don't prefer goats that are giants already before they reach their first year - way too much pressure on growth plates and risk for arthritic changes in the joints later in life. Also, size isn't everything in packing and a big but lazy goat has less worth than a smaller goat that packs its heart out.

My goats always did a considerate amount of growing between 2 and 4/5 so for me it would be a non-brainer to purchase two year olds with 140 lbs. I would look more on conformation and work attitude than size.