Originally Posted by Gizmo
KInda but more like splint boots or something like that. I when I look at them on websites it says splint boots and then sliding boots and all kinds. I just don't know what to get him.
Those kind of boots don't really matter for a foundered horse. Foundering effects the structures inside the hoof, not the lower leg. If your vet wants you to use boots, then he's talking about hoof boots like kitten_val posted.
I would suggest one of the EasyBoot line, either the Edge or Gloves, or Old Mac's G2 boots (also sold by EasyBoot). ValleyVet.com has the best prices on EasyBoots. You will need to take good measurements of your horse's feet after a fresh trim. Have your farrier help you. The Gloves are best fitted with taking the measurement in cm's. Once you find the boots that match your horse's hoof shape, buy the boots and a set of comfort pads to go in them. The comfort pads will make the boots fit more snug, so keep that in mind when boot shopping.