They should have a well check at least once a year. They should have their yearly vaccinations for tetnus and other diseases horses can get from parasites. They should be wormed every 3 months for many kinds of worms. Otherwise, just keeping an eye out for any ailments they may get.
A 16 year old typically needs a medical evaluation once a year from a doctor. Medical evaluations may be needed more frequently if any ailments are present.
A 13 year old horse is not too old to compete in cross country competitions. The horse just needs to be physically fit to compete. Horses live well into their 30`s now. Your mother needs to accept that things change. If you get this horse into shape, feed it right, there is no reason except a medical one that could stop this horse from doing any kind of competition! If the horse has no medical issues, there is nothing that can stop it, except your mother.
I'd estimate the cost to be in the $20-$30 range, and a horse needs it once a year. If you had the test done in June he would need it again the following June, not at the first of the year.
winter
they usually need about 3% or their body weight per day. so if the horse weighs 100 lbs. (theoretically, of course), then it needs three pounds of food each day, and if it stays that way the whole year (it wouldn't, but this is just an example) then that adds up to about 1095 lbs. for that year
autumn
It depends on what kind of horses coat your horse has all year round. If it has a thick coat then it would be fine in a weed-free paddock. If your horse has a smooth, fine coat it would probably need some sort of sturdy shelter against the cold. If your horse is an 'outside' horse, it would need a winter cover. It would also need some trees for shelter. It needs to have a fence and a gate. If you have a 'inside' horse you will need the sturdy shelter, a heavy winter cover and basic stable things. Hayley
Yes! A horse needs new shoes every 2 months or a foot problem is sure to occur.
Winter
If you are asking if she needs medical attention then you are obviously concerned - and if you are ever concerned that someone needs medical attention then the best course of action is to get them medical attention - better to see the doctor and be advised everything is ok rather than don't see the doctor and something bad to happen. Take her to the doctor.
Need to know the year.
Need to know the year. they are all different.