With bad cases of thrush, I've always used the following concoction (sp?):
- Strong thrush medicine - like foulex by tuttles
- cotton roll cut into 2 hoof size pieces and 2 1 inch by 4 inch strips
- duct tape
- vet wrap
Start off by cleaning the hoof and then take the strips of cotton and press down into the creavasses between the frog and hoof. Soak
the strips with foulex or other liquid medication
Apply the two hoof shaped pads on top
Wrap with vetwrap, then with ductape (lots of it!) - I usually make a sheet of duct tape with 5-6 pieces going vertically and overlay 5-6 pices going horizontally; if you put them slightly overlapping on a fence or piece of metal, you get a sheet of duct tape you can apply to the hoof.
If the horse is in, this will work pretty well - but be sure to change it every 24 hours (new everything).
Also, when he does go out, be sure the boot is off