Interesting topic. I have a neighbor that is a cattle wheeler-dealer of sorts, with at least 300 head at anytime in the various places he owns or rents nearby. He doesn't do anything to control a Canadian Thistle infestation or weeds onhis side of the fence. My side is practically clear of them. I hate to complain much too because:
I have known him for close to 30 years. 15 years ago he loaned me a bull of the breed of my choice when I had no money to buy one. I can attribute that to me having a mostly Charolais herd today. If something would happen to mine could get a bull of my choice dropped off anytime within a few days until I found another. He'll loan me about anything I need on short notice, such as a loader tractor. I let him cut line fences in two places to move in a mobile home across my property for a relative when there was no other way in. He bought a connecting piece of property to mine and asked if he could use some of my water for a while until he got a meter installed. I said absolutely but showed him an existing water meter on his property. He would do the same for me. That's practically how all the neighbors are in the near vicinity. We share an 8 strand barbed wire fence with one hot wire which we both maintain. Before the hot wire the bulls tore it up and I had a tame pure Brahma bull in with mine. I said it would be nice to have a couple calves from him so he said just keep him a month or two and we'll get him back. We neighbors have a very good relationship which I would like to keep.