Initial Management:For this topic, I will use SC's Topaz as the subject horse. He is typical of many starved horses in that he is a Thoroughbred, he is in his teens and has come from a more or less unknown background.
When the emaciated horse first arrives into care it is imperative that before all else, it is given a start back into feeding. Starved horses are very weak, and very fragile - you need to be very careful when feeding them. Often if the horse has had no feed whatsoever for 24 hours or more their digestion system begins to all but shut down. With very underweight horses, they will need to be fed tiny amounts and often.
First and foremost you need adequate facilities for such an animal. A well built yard with horse-safe fencing and a well latched gate is required initially - these animals are not strong enough to fend off bullies in the paddock! You also need a well built, safe shelter, and a nice big water trough that is scrubbed daily. It is very important to ensure that fresh clean water is provided for the horse 24/7 as underweight horses are very easily dehydrated which in turn can lead to colic or death through thirst.
You will need to have a good Vet attend immediately. It is best to call them to arrange for them to come and see the horse the minute you know you are accepting ownership of it. Do not worm or vaccinate the horse before the Vet has seen to it.
Your Vet will need to assess the animal's condition, check heart-rate, temperature and gum colour. They should check the horse over for any signs of illness or parasites and they will also need to take blood to test for liver function (which is very often comprimised when a horse has been starved), as well as white blood cell count and any signs of viruses or other problems.
Some horses that are not too badly off will do well to have a worm and paraffin oil drench, some will be too weak. It is common for emaciated horses to be too weak for worming and dental work initially, your Vet will tell you if this is the case and may instruct you to wait up to three or four weeks for the horse to put some condition on before it can be wormed. We have also found it is common for Vets to tell you to just give the horse a half-dose for its weight when it is ready for worming and then another half dose 2 weeks later before putting them on a full dose on the usual 6 week cycle. This is because if the horse has a bad worm infestation, a full dose immediately may kill off too many at once and the horse is at high risk of a bad impaction colic if the body tries to pass all those large worms at once.
Feeding:With Topaz (and another, thinner horse SC has worked on rehabbing) he was given just 300g of dampened chaff
every 3 hours around the clock for a week. For those of you who have had children, it will be reminiscent of having a new baby all over again. It is imperative they get this care, and are checked on this frequently as without it they can easily go down or colic and could go unnoticed until the next feed which in cases of fragile animals like this can be too late.
He was also given a very large bucket full of soaked hay cubes around the clock to pick at whenever he wanted. Most horses in this sort of condition have very bad teeth. With cases like this feeding hay is useless as they cannot chew it up properly and risk an impaction if they swallow unchewed pieces, so hay cubes are the ideal solution. It is important that the cubes are well soaked and that the chaff is thoroughly dampened as this helps to raise hydration levels also.
Do not start giving the horse pellets, grains or vitamin suppliments for at the very least a week. You will need to get the body used to eating again, starting with the basic roughage their bodies were designed for before introducing additional feeds. Your Vet will help you work out when to begin introducing other feeds but you do need to be very careful when altering their diet so that it doesn't give the horse's body a shock which could lead to colic or in extreme cases, Refeeding Syndrome.
Refeeding Syndrome:Another thing to be aware of is Refeeding Syndrome. In a manner similar to humans, the feeding of concentrated calories to a starving horse can lead to a condition called ‘Re-feeding Syndrome’. This syndrome can cause kidney, heart and respiratory failure 3 to 5 days after the first feeding. If you introduce concentrated calories too quickly back into a horse's diet after a period of starvation, you risk an elevation in the insulin. When insulin increases; it starts an electrolyte shift that ultimately can cause a respiratory compromise. This causes red blood cells collapse and with that, the patient doesn’t have adequate oxygen transfer and the horse goes into this irreversible condition that can lead to death.
When a starving horse is fed a high carbohydrate meal, insulin is released in response to the high starch levels. Insulin is a hormone that stores carbohydrates in cells for use as an energy source. At the same time, the released insulin pulls magnesium and phosphorous out of circulation and into the cell. During starvation the horse’s electrolytes have been depleted and the starved horse doesn’t have additional stores available for normal functioning. During the course of the next several days a cumulative effect occurs during each feeding of high carbohydrate feed. The continued depletion of these electrolytes can lead to death by respiratory, cardiac or kidney failure. In such cases, death usually occurs within 3 to 5 days.
Again your Veterinarian can assist you with outlining the required care going on your rescue's condition and the results of the blood-tests. Get used to seeing your Vet, you'll likely have them visit quite often for the next few months.
Keep A Diary:It is a good idea to keep a diary of your horse's progress. Take photos from each angle of the horse standing reasonably square on level ground (both sides - each time with the mane out of the way so the neck is clearly visible, from directly behind, and also from the front looking back over the rump) on day #1 and every week (or every day if you choose) from there on in.
Other things to include in your diary are horse's weight (weight tapes are reasonably accurate even in poor condition), body score, how often and what and how much the horse is being fed, how many manures in a 24 hour timeframe, consistancy of manures and horse's overall appearance and demeanour.
EG
SC's TopazApprox 16hh chestnut Thoroughbred gelding. 18 years of age.
Stats on day 1:Demeanour: Topaz is wobbly on his feet, and cannot walk in a straight line. He has to have 2 or 3 tries to get up after a roll or a nap. He is mildly interested in his surroundings, but is reluctant to move much at all. He spends a lot of time dozing on his feet.
Other problems: A stinky, heavy yellow discharge from his left nostril and rain scald over back and rump.
Body Score: 0.5
Weight: Approx 448 kilos
Feeds: 1 kilo of soaked hay cubes, 300g dampened oaten chaff
Feed Frequency: Every 3 hours
Manures in 24 hours: 5


