I'm going to be the small voice of dissent here.
A coggins belongs to the horse owner
, not someone merely leasing an animal. Why should someone other than the owner pay for a coggins since it should be in the owner's name, not the lessee's?
If the lessee has one pulled in their own
name it'll be invalid to the owner when they take the animal back, and a new one will have to be pulled anyway.
Seriously OP, from your first post it appeared that you leased the horse to these people knowing
they weren't a good fit for you philosophically. They don't like your training methods, and you dislike the way they handle and treat horses. What about any of this made you think it would be a good fit with no disagreements?
If you have a signed lease contract, things like coggins, deworming, farrier and vet visits should all have been spelled out beforehand. If they weren't, then I can see the confusion.
I think more than just a disagreement about who pays for a coggins led to you taking back your horse. Sounds as if there's a whole lot of back story we're not getting.
After all, a coggins costs $25.00-$30.00 tops. I can't see someone cancelling a lease and taking their horse back for something that trivial.