Heres why: Probios contain digestive bacteria. Beer is very much alive and contains digestive yeasts, B-12, B-6, B-1 (all chelated to the yeasts), plus hops which increase appetite and give a feeling of well being. They do work differently and will also work together.
4-6 oz 1-2 times a day for small/large adult goats...adjust accordingly
For young kids: As long as kids are chewing a cud, dark beer can be helpful, but at much smaller doses...I would dose at 1/2 cc per pound..