1. Over Feeding
Overfeeding is a particular problem in young horses. While it's tempting to keep your weanling or yearling pleasingly plump, too rapid growth can cause joint malformations. Your youngster will benefit from slow steady growth, regular parasite control medications and ample exercise that keep it lean and fit.
2. Under FeedingUnder feeding can be a problem with senior horses and horses that are working hard. While hard working horses can be expected to look lean, they shouldn't look gaunt. If hay or pasture won't keep your working horse in good condition, look to concentrates to make up the shortfall. However, keep in mind that the bulk of your horse's diet should be made up of grass or hay. Under feeding hay or pasture, and over feeding grains and concentrates can lead to colic.
Senior horses lose the ability to digest food efficiently and may need a little extra help in the form of supplements and concentrates. Look for feeds specially developed for senior horses.
3. Inadequate Pasture GrassIt's easy to look at a pasture from the distance and think it's lush and green. But closer inspection may reveal that your pasture is being overtaken by undesirable weeds. This means horses have to work harder to find enough food and may start eating the less nutritional and sometimes toxic weeds. Look after your pastures so they can provide good grazing for your horses.
4. Poor HayBuying hay can be difficult, but it really is worth it to be particular because poor hay can cause all types of problems. Hay may be nutritionally deficient. Some hays are not suitable for horses and can cause colic. Dusty, moldy hay can be bad for your horse's lungs. Learn how to pick the best hay for your horse.
5. Calculating by Volume not Weight
It's important to feed both hay and concentrates by weight not be volume. Although it will be difficult to determine the weight of the hay your horse eats if it is eating free choice from a round bale, you can estimate the weight of the hay your horse is eating if you're using small square bales. Why is this important? Generally, owners throw their horses a 'few flakes' of hay for each meal. But not all small squares are of equal weight. I once bought a truck load of small squares of very fine, loosely baled hay. It required almost 50% more hay to keep my horses in good condition than when I was using heavier bales. If I had stuck to the 'few flakes' formula, my horses would have been underfed.
Weighing grain concentrates is important too. Most of us use the scoop method. But horse feed companies recommend feeding by weight and calculate recommended portions by body weight. If you just go by eye, you may be under or over-feeding your horse. At least weigh the portions to calculate the amount, then mark your scoop so you're feeding the same amount each time.