Mare dropping weight over night

My horse is loosing weight so fast now winter is approaching, and was hoping someone might be able to suggest something I haven't already tried, or sugest something I may have missed health wise.

She is a TB x ISH so typically a "ribby" bread, but she is dropping weight sooo fast at the moment, she looks like a rescue case. Her worming is up to date, and she had a 6month checkup 2 weeks or so ago where everything was okay, and her blood tests where clear. She is her self in normal activity and her coat is glossy and she's alert and no different to normal. She is 13years old so not dropping weight due to age, and gets fed 2 feeds a day which are made up of, blue chip build up and conditioning mix, alapha a oil, motozla corn oil, marmite, black sunflower seeds, aconite and a probiotic gut balancer for effect digestion. Plus 24 hour turn out, although I no there isnt much left in the grass atm, but she will be moving in on sunday. She does windsuck/crib bite, but I tried a windsucking coller and she refuses to eat and drink with it on, so I can't keep it on 24/7, tar stips and hair spraying the top of her door doesnt seam to stop her either.

Thanks in advance x

When were her teeth floated last? If she can't chew her food well, a lot of it is just going to come back out without having done her any good.

Does she get hay in addition to the feed you mentioned? If so - what type & how much?

She had them floated early april, by my usual horsey dentist, he is normally pretty good and she doesn't seam to be having any difficulty in eatting her feed. She gets 1 small holed net of local halage at the moment, but when she comes in for the winter and isn't turned out 24/7 (this sunday) she will get 3 nets a day and 4-7hours turnout depending on the fields.

If she's cribbing, she's tricking herself into thinking she's full. Does she get turnout in grass? Are you sure the collar is adjusted properly? If it's too tight initially she may be unable to crane her neck and eat/drink so it isn't a matter of her refusing as much as it is she isn't physically able. When the collar is on properly it only cuts off the esophagus when she inflates her neck to suck in the air. I'd say have a vet make a recommendation.

Start feeding her hay. If there isn't any pasture like you mentioned, she has to eat some roughage as well as all those supplements you're giving her. Just supplements alone won't put weight on a horse.

I agree with the others. The grass in the pastures are starting to slow down in the growth department. She will need supplemental hay.

She probably isn't getting enough grass.

I'm not sure how much hay is "1 holed net" but I'm guessing it's not enough. She needs the bulk of that hey to replace grass in order to keep her from burning body fat (and re-using muscle cells) for fuel.

I'm not there but I'd guess that northern England is probably similiar to Northern/Midwest US climate wise; which means there is really nothing left as far as grass goes. What is left is dead enough that it has little nutritional value.

Your best bet is to find a way for her to have free access to grass hay if at all possible. If she's significantly underweight (which it sounds like), then she should also have a decent amount of a higher-protein hay, such as alfalfa. (Not sure what you do or do not have access to in your area).

Lots and lots of hay. I have a TB. As long as he's knee deep in hay, he actually gains weight in winter. I also have my guy on Omegatin for fat content and amino acids, and Smart Digest to make sure everything he's eating get processed by his body as effectively as possible.

Haven't heard that one before. If she's a cribber, has she been checked/treated for ulcers? This is definitely something that can go on compulsively after the physical probs that caused it have been treated, but certainly worth considering physical causes if you haven't. Agree with others that she needs more hay & also roughage mixed with all those supps. You're feeding a lot of fat/oil(not that you give an amount of each), so I'd look at cutting down/out some of that & ensuring she's not getting much per meal either - spread it over a couple more feeds if you're feeding much.

I remember several years ago when I was taught that cribbing horses 'tricked' themselves into thinking they were full because of air passing through their stomach. I just did a quick e-search and found this:

So, my mistake ;) Learn something new every day.