I agree Bill.

Relative weights on the LMB should vary with the season and vegetation densities. Winter time and early spring are when vegetation densities are usually at a minimum and LMB RW's their best.

I would also look into the body condition of any larger BG that might be present, if they are in poor condition then this would be a good indicator there are too many BG mouths to feed and some adjustments might need to be made.