Meowy Catkin
Meow!
If an owner doesn't ever want there horse left a lone they should buy a 2nd! Its not up to yard owner or other liveries to worry about someone else's horse. Either teach your horse to get use to their own company or buy and pay for 2nd one! I have my own yard and I expect all horses to be ok on there own if required.
So now people need to be rich enough to have two?
What ever happened to helping out your fellow liveries? Having camaraderie on the yard? Doing the right thing for the horses or just following the yard rules (eg in this case, no horse left alone)?