I would like to weigh in on this topic if I might. As most of you know, anti-venom is still largely collected from horses. They inject venom into these noble animals in doses small enough for them to handle and the horse develops the anti-bodies to neutralize the venom. Viola - anti-venom. There are arguments from both camps on a dog's ability to do the same. I am in the pro camp. As long as someone with the appropriate "smarts" figures out the correct dosage, I believe it can work. One caveot - some dog breeds are, in my opinion, too fragile to handle this regimen - i.e. Maltese, Poms, etc. (Now don't you Maltese owners attack me - I am just trying to help your dog). But when it comes to a human doing this - whoa!!!! There are some nuts out there who have been doing this. In fact, I saw a documentary on this - and the fool is one shot away from eternity. Bill Haas, the curator/owner of the Miami Serpentarium, now nearing 90, has been bitten over 170 times and he has developed some immunities to certain venom. He usually still needs medical care, but his chances of survival are HUGE. But he is the exception and his was not a planned immunity build-up, but came about by a series of misfortunate mistakes. It was an unexpected result. Snake venom varies with different creatures, and I am not talking only about hemotoxin vs. neurotoxin. Certain elements can vary from snake to snake in the same species. Moreover, often a snakebite from a venomous snake will be a "dry" bite - or venom-free. For whatever reason, the snake either just used a lot of venom on prey or chose not to use its venom on some fool putting their hands in his den. But conversely, some snakes do not have the opportunity to use their venom for awhile and you get a full load bite. The eastern diamonback is famous for this, as is the western diamondback. They usually inject an enormous amount of venom and no pre-bite regimen of introduced venom into one's body is going to help you in that situation. Indeed, it might work in just the opposite way and have so exhausted your natural defenses that you might experience an allegic reaction (anafelectic). Hope I didn't come across curt or judgmental - just trying to help.