i would probably say lots of water and a bit of sugary things so it has energy otherwise u could be pushing your horse to hard and i have a horse shes got Arthritis in her left back leg and she cant over do it so if it is in middle age like 16 and up to about 21 so just get your horses vet and ask if they can check her daily to see if she has or hasn't got anything wrong with her think yourselves lucky that u even have a horse so don't work your horse everyday give it some time to rest because u could overdo it and lose her/him
horses that are frequently exercised need feed with higher fiber and less suger,
Salt
Frequently exercised horses need extra minerals and grain.
increased fat
on howrse the answer is increased protein and carb.
Horses that are frequently exercised need what? Increased protein Increased carbohydrate
Howrse answers: Increased carbohydrates and protein
oaten chaff lucine chaff bute
Food and care. And usually a horse will want to take a little rest.
They need carbohydrates
They need more food
well, i know that this is a question for one of the levels, but you should go to howrseinfo.com it will give you all of the answers for all of the levels!