Yeah, heat a problem here too. Not so much pasturing but during workouts. I do what I can to reduce risks of foundering but I have problems with their hooves drying out too. One came from Bandera and I had the same problems as the one that came from Oklahoma so I guess it's a deep south problem. I will start them back on corn oil next month. Some people told me it only shines the coat and won't help the hoofs but it did. Other factors invovled but it did seem to hype the mare up a little though. I figure if I can keep them cool and keep their feet from cracking, oiling the bowels and a shiny coat a nice bonus:')
What I do is to let the stock tank overflow so that the area around it is wet, and then when they come to drink it wets their feet.
My farrier approved, said it was a good practice.
When I put Hooflex on them, I really plaster it on around the corona band, so that during the day it gradually soaks down into the hoof.
I have only heard about heat founder. But you know what, it just occured to me, what I meant was heat Colic!
Sorry; heat colic, not founder.
Yes, corn oil is great. I buy huge jugs of the cheapest kind. I think it helps the hooves.
But keeping the area around their water tank or tub or whatever wet, makes it messy to clean hooves but it's good for their feet in a hot, dry climate.