I carry the Sawyer sting and bite kit. Like many others in the forum I have used it with success on several insect,spider and even a rattlesnake envenomation. I just returned from a very frustrating experience. A 2 year old filly was bitten on the anterior cannon , 4" above the fetlock by a Pacific Diamondback. Identification was easy, what with 4' of snake in the corral. I collected the horse as the absent owner's DVM was summoned. First aid consisted of quickly washing the wound site with saline solution, applying vetwrap ( crepe stretch gauze) above and below the exposed bite and applying the suction unit. A substantial volume of fluid was removed and placed into a safe container. Respiratory,heart and temperature were taken and recorded.The DVM and assistant arrived. I briefed them on my efforts. The vetwraps were removed. I was lectured ( chastised) about ALL suction protocols being useless and ineffective. I am watching the obvious demarcation of envenomated and previously pressure bandaged soft tissue merge into increased swelling. I am at a loss. We summoned the DVM immedietely and performed non invasive first aid. Peanut, Beachdoc , Trustbox?