Join Date: Aug 2009
Location: New South Wales, Australia
I think as far as feeding goes, it depends on where you live. I live in Australia and we are known for having "bad" soil, at least in most places. It means that the grass grown here, and probably Australian purchased hay, will not have sufficient vitamins and minerals. This can happen anywhere. For this reason I always feed a good pellet mix and usually some added minerals. I recommend you do this, as pellets are not that expensive. If your horse does not receive adequate nutrition he could be more susceptible to illness or infection and you'll end up paying so much more in vet bills. We always fed our horses a good diet and I've never had a sick horse.
Also, I don't think horses are that sensitive to food changes. Some will be, and hopefully the owner should tell you, but I've switched hay a fair few times (you never know what is going to be available at the feed store) and never had any problems. Be aware of their condition but I don't think you have to be as concerned with hay. If you are adding pellet feed and minerals do it slowly.