Hi, I'm a hoof care practitioner & rehab specialist, with (unfortunately) a lot of experience with laminitis/mechanical founder/IR etc. As usual, Walkin has already beaten me to some great info. I will ask though, - to Walkin too, because IME it depends which 'experts' you talk to as to definition - what is the difference in your/your vet's eyes, between IR & EMS? It can be used interchangeably.
The vet said she has a slight rotation in her coffin bone. What does a slight rotation say for the future of this horse? Can she be ridden fully when not lame.
As others have said, probably, if managed well, but depends on specifics. Generally, unless it's been so chronic that a fair amount of pedal bone has already eroded away, or the damage has allowed for too much other bone remodelling/arthritis etc, then it is absolutely possible to return a horse to complete soundness. There is a fantastic, very informative book(among many other sources) called 'The Pony That Did Not Die' from a farrier & rehab specialist, which is also available in digital form, which is available at www.barehoofcare.com
that I highly recommend.
You could also check out the link in my signature for what's required, & post hoof pics here, and if possible, the xray would be helpful. There are a few of us here who can give you some good info on specifics.
I exercise her when weather permits, I had my hay tested and its all good. I feed Triple Crown Lite 1 pound in am and pm to get all her medications and supplements in, also to balance her diet as the hay is restricted. I currently feeding 15 pounds a hay a day. Most of the time I feed in 3 different feedings. ... The goal of the vet is to lose weight as quickly.
Echoing Yogi too that I would only exercise her if she is sound for it - boots may permit this. I'd also be extremely cautious about exercising her if the mechanical distortion of her feet is not in hand & she is trimmed in such a way as to avoid further mechanical stress. That said, exercise is vitally important, and regardless of weather, if she's sound to do so(never force a sore horse), I would ensure she was getting as much 'low grade'(as in, good long walks, as opposed to lunging or speed work) exercise EVERY day as possible.
Also echoing re feed... *Maybe* 15lb/day in 3 feeds is enough, but I wouldn't want to feed under around 2% of *desired* bwt daily, of which 15lb would only amount to enough for a 750lb pony. I'd also want to ensure the horse doesn't go hungry for long periods at all, which I'm guessing she would, if you're feeding 3 meals a day & restricting. Yes, weight loss ASAP is important, but not at the expense of a healthy gut - 'crash diets' are especially bad for horses, not just because, like for us it causes the metabolism to go into 'famine mode', but because of the way a horse's digestion is, periods of empty stomach/hunger cause problems such as ulcers, acidosis, and that of itself can also cause further laminitic 'episodes'.
If your hay has been tested & is low enough sugar(which is the biggest issue with straw or other cereal hay - can be very high sugar/cals), it is often OK to allow the horse free access to hay in a 'slow feeder' - eg. small holed net. If it's too high sugar, you can also soak & drain the hay first in fresh water, to leach out some of the sugars. If the horse isn't exercising much/at all & just standing at the hay all day, then this may still be too much, but that's what I'd aim to start with, and if you have to restrict, still ensure she's getting enough over night etc, to not go empty stomached.
That Triple Crown Lite looks OK as far as energy/NSC is concerned, and if you have had her diet analysed that those nutrients/amounts do indeed balance well, maybe the best option. But generally generic type feeds don't have a great nutritional balance, and extra vitamins(as opposed to minerals) aren't generally necessary. High iron for eg is a general prob, esp with feet, and this feed has added iron. Ca/Mg ratios may also be problematic, if the horse isn't also receiving extra Mg. Personally, having managed many fatty-boombahs, I prefer to just use a handful of lucerne(just a handful won't tend to be problematic unless she's seriously sensitive to it) or speedibeet or such, as a 'carrier' for appropriate supplements/meds.
The rotation was 2 cm with the coffin bone he measure it on the X-ray. But I am not sure how he measure it from what point. I am feeding a grassy hay as fjord do not do well on Alpha hay. I weigh the hay with each feeding and do feed three times a day, most days. My mare cannot go on pasture anymore per vet instructions. Fjord can only be on pasture for about 4 hours a day or they gain to much weight. Growing fjord can have more.
2cm sounds to me like a major
degree of rotation! But it does depend a bit on how he's measured that.... and whether you meant 2 percent, not 2cm out of whack. Again, if you'd like more specific advice, pics & xray necessary. And I'd want to correct those mechanics before doing any serious exercise or riding the horse.
I suggest you learn more about pasture risk, sugars in grass, etc. Depends what kind of 'pasture' and the weather, time of day etc, as to how rich/sugary it may be, as to whether it's dangerous to let your horse graze growing grass. The benefits may well outweigh the dangers too. Grass loses nutrients but doesn't lose sugar content when not growing/cut/dried, so hay isn't necessarily any less 'rich' in sugars than growing grass(which is why I mentioned possibly soaking high sugar hay). Grass also gains sugars with photosynthesis/sunlight, and uses those sugars over night to grow, so, weather dependent, it is generally low sugar & safest to allow grazing in the morning and it's highest in late afternoon/early evening.
And the last sentence I quoted above... do you have a growing youngster you're worried about too?