https://www.behlencountry.com/product-category/feeders/haysmart-bale-feeder/

So far I like this one. Not cheap as in about $1000. Bomgarrs can order them. I got one from QC supply. Not sure the link will work
 The chains are adjustable on the inside top of the feeder. Lowering them lets calves reach in better. They can also be adjusted at the ring at the bottom of the chain. They are tall enough a cow cant reach over the top and drag hay out. Have not had it a long time but so far so good