Riding School Notice

I think we should have a little icon next to our horses name that tells us they are still actively working at a riding school. I end up putting horses in riding schools according to their specific discipline and then just put others in a riding school en mass. So then occasionally I will lose track of the horses I have that are in a different riding school than the others and I will have to search through all of horses to find the one who is still working. I feel that an icon like the breeding hearts would help solve this issue. If I am making no sense please let me know nicely and I will try to explain better.