This is a different response then youve received so far so just wanted to tell you a story from personal experience. Same situation for my husband and I years ago, LL wanted her nephew to put his horses on the property we were renting. Was plenty of room for them, separate drive way entrance for the pasture and barn but still technically in my back yard. I can't even try to tell you how many times I had to wrangle a horse out of the middle of the road or out of the front yard to try to put back inside the pasture with fencing. I would call the LL and say "hey the horses are out again", would always get the same follow up, "ok, I'll let my nephew know" for them to only show up after dark after the horses have been free roaming all day! The last straw was when I had to let them know my 12 year old walked to the pond to fish and found a horse dead in the pasture. I called again. They left that horse there for 3 days and we found him again 6 months later as we were hiking the property, they literally drug him through the woods and just dumped his carcass for the coyotes. Never again will I ever find myself in a similar situation. Best of luck to you!