hooves were very long and in bad condition over all. We got them trimmed by a good ferrier
If you would like any specific opinions/advice on her feet, post pics - check out link below for tips.
She was not broke to ride before I got her, but I've been training her. We do a w/t for 30 mins about 4 times a week
Please consider that she is still physically immature & has already had a lot of undue stress on her lower spine, pelvis & hips especially, through racing. I would generally be giving her a year or so off before riding & then taking it easy for a couple of years after that before any hard mounted work. If you would like more info on developmental stages of horses, look up Dr Deb Bennett.
She is outside weather permitting (we have lots of snow), and in at night.
She is very skinny, so we are working on that, tips on that would be good
Sounds reasonable what she's getting, depending how much 'a scoop' is(best weighed) & what exactly the high fat/fibre feed is. Little & often feeding is best, so if you can possibly give her more 'hard feed' meals daily that would help. May or may not want to increase the quantity or change/add different feed. Need more info to say. She would however, benefit from appropriate nutritional supplementation to balance her diet. Omega 3 rich oil or oilseed such as flax/linseed is helpful for weight gain as well as overall health & hoof/skin/coat health. Google 'Magnesium For Horses' & consider that she may benefit from extra Mg in the diet too.
Being a racehorse, she is likely to have spent substantial time stabled, fed 'high octane' meals & not enough roughage(can't have racehorses with hay bellies!). This commonly causes acidosis, colic, ulcers, etc & resulting 'low grade' laminitis. Therefore in addition to getting her onto healthy diet & management, I'd be treating her for ulcers & adding a probiotic to her feed, in the short term at least.
I've noticed almost everyday she has more and more chips and small chunks missing.
As Trinity said, if they're chipping/chunking off, it's likely because they're due for a trim. Considering where they were a few weeks back, the farrier may not have been able to make all the 'corrections' needed in a single trim, and they were likely compromised/weakened to some degree apart from the overgrowth. Therefore, until they're strong, 2-3 weekly trims may be in order for her, for a few cycles at least.
My instuctor recommended shoes, but I'd love if that were a last resort, as they just aren't healthy for the horse. But I will get shoes if she needs them!
I would not put shoes on an immature foot - the caudal hoof, in ideal circumstances, doesn't *begin* to develop strength until around 5-6 years old. I also would not (generally) advise conventional rims on weak/compromised hooves, but would at least wait until they're strong before considering. Hoof boots are one good alternative if the horse doesn't cope comfortably with everything you ask of her.