Hairy Heel Warts are NOT fungal. ONce you have them on your place they are almost impossible to get rid of, hairy wart disease lingers in your soil, calves can contract them in dry conditions as well as wet conditions. It is good to see a vet to learn how to treat them but it isn't going to be good to call a vet everytime one appears...they can make a calf go lame pretty quick and can come back and back even once treated. If you suspect haiy warts (lameness, not wanting to put the back of foot down, horrible smell, or you can see them) you should put the calf on the table and treat with a combination of oxy tetr on top of bandage plusl coppertox and place this combination on a bandage and stuff it up between the hooves on the bottom side, and then wrap it tight, hopefully they won't fall off, but remove several days later. As preventative you should buy a foot bath and walk them through it up to the hairline with duramyacin x 2 and coppertox full bottle mixed with water. Try not to use the bath over and over that has been sitting or has been crapped in or else you are bringing in more contamination. Good luck they are a nuisance and not to be confused with foot rot