Maybe you didn't read my post and surely not my bio, but I grow forage so no animals. I'd never use antifreeze in tires, nor beet pulp, nor CaCl nor windshield washer fluid. Nothing but compressed air.
Loaded tires in an ag application are for tillage and that's even getting old school. In my business, the lighter the footprint of the prime mover, the less impact on the forage plant.
If I need some counterweight for the FEL and most times I don't, I'd just put on the rear spear and hang a round bale out back........edible counterweight. /forums/images/graemlins/grin.gif