Underneath this is a BIG hole in the sole, and a DEEP hole. We had to get the vet back out as Tucker reverted to a three legged horse once again. I tried to clean it out by myself, but she would not let me near it. The vet tried with the same result. After all, she is an 1100 pound horse.
So more sedative and another heavy dose of penicillin! Once the sedative kicked in, he tried again, and again had difficulty. I grabbed an ear and twitched it hard to get her mind off the foot. Take your thumb and forefinger and grab an ear as hard as you can squeeze at the same time twisting the ear. This reminds you of your old school days, right? It worked and he cleaned out the abscess again, and opened it up more.
I will spare you pictures for two reasons. 1: It was a bloody mess with gobs of black stuff. 2: I couldn't hold the camera with one hand and twitch the ear with the other at the same time as dodging the odd hoof heading my way.
Under the duct tape is the hole packed with blue stone ( copper sulphate) and a one foot square of old denim to keep the chemical in and the dirt out.
When the vet was done, I soaked the hoof well with a solution of Epsom salts and water.
I guess this is another use for duct tape that Red Green hasn't figured out!