Sometimes farrier’s get too carried away when it comes to trimming hooves that have been let go for a long time.
They take too much in one strike, which can really the sore the horse up — either in the hooves, the tendons or both
I would not want this particular farrier trying to trim this yearling again, for fear you end up with a horse with permanent damage in the leg(s). The farrier does not appear knowledgeable in corrective work and may possibly over-correct the splay foot.
The vet (hopefully good on lameness issues) really should take x-rays of the hoof and ultrasound the leg, IMHO, and go from there.
You did mention changing farrier’s, if you don’t know of a therapeutic farrier in your area, try looking on New Horse.
https://www.newhorse.com/
Click on The “farrier’s” button, then go to your state and also the neighboring state, if you’re close to a border
Now that you’ve explained how the baby got swollen ankles, you could cold hose all of them for 10-12 minutes each, if the swelling is still there. I hope it isn’t - it should have started going down by now.
Do the ankles feel warm to the touch?
If they do, since there are four to deal with, I would poultice and wrap. Sore-No-More is a benzonite clay/arnica cold poultice that you can wrap.
My lameness vet had me cold hose the legs, poultice, wrap with vet wrap, cover with pillow leg wraps (which there is a right and wrong direction to wrap), then wrap all that with Velcro closure standing wraps.
I had to do that for 11 months when an AFA certifies farrier took too much heel off my foundered horse in one strike and literally tore both front tendons.
Also, your yearling isn’t a Tennessee Walker is it? Many of them do tend to be splay-footed but they are generally born splay-footed on both fronts and the rule is to not try and correct them, just to trim the hooves according to what they ask for
Your follow-up explanation helped a lot. When I saw your photos and those swollen joints, I nearly passed out and immediately thought this is not a question for the cyber world to figure out, it’s a question for a hands on vet.
It is still a question for a vet that can physically examine and hopefully x-ray your yearling but at least your further explanation has allowed for some input
Please let us know what the vet says and I hope you can find a farrier who specializes in lameness issues, even though the yearling isn’t lame. Therapeutic farrier’s have had training in various types of hoof issues that the typical farrier has not