lenajo wrote:I was "gifted" an adult standard donkey - ungelded. I think he's about 4
We own a donkey jack. He has killed sheep. There is no way I'd ever consider him a suitable guardian. Even gelding him at that age will not necessarily change his behavior. Plus, gelding donkeys is not the same as gelding a horse, it's a lot more difficult so be sure you get a good surgeon to do it. The risk of complications is a lot higher as his equipment is larger for his body size than a stallion.
The people I know who are successful with donkey guardians all have sheep that are tight flocking breeds, only have a single equine on the place with no other equines nearby and have had their guardian animal in with sheep since weaning. Without all those in place I'd never trust a donkey to guard not kill the stock.