Ok, dumb question. I live in communist Canada where you can't get any damn thing over the counter have to go to the vet for everything. I was somehow able to get terramycin eye ointment for my dogs eye infection. Now when I'm reading online about treatments for sick livestock I hear about terramycin injectable. Obviously the application is different but what is the real difference? Can't put the ointment up the nose of a sick animal I guess?