I have a big problem with my horse. He has itching, does not rub big on the head and has such places on the whole body as in the pictures. No veterinarian knows what it is, except one said Filaria and treated with Dectomax. Now we give Ivermectin in 2-week interval in double dose. 2 weeks ago we gave Quest Plus, since then it has gotten worse. Today my horse had the whole mouth full of pustules and blisters as well as the inner thigh. Called the vet, he can not help me except that we continue to administer ivermectin. Maybe someone has ever seen something like that here?