Hey,
I've used it with great success and would recommend it to anyone experiencing a mite infestation. But first, I would treat the animal in question with a good old soak in a tub with good old fashion soap and water, by soaking and lathering the snake with either bath soap or dish detergent. The surfactant's in the soap works to suffocate the critters and not the snake. You can also, soak the snake over night, or for a few hours. I don't know the size of the snake (blood), so exercise caution with water levels and amount of soaking. A little goes a long way.
You should also start by cleaning out the cage and washing out any of the cage items with good old fashion bleach and a little elbow grease (muscles man!) and hot water. Toss out any substrate and try your very best to not scatter the dust from the substrate if you're using something other than newspaper. Tossing in a couple of moth balls (do not use moth balls in cages) with the trash would help too. Once cleaned, spray the newspaper or other substrate that you prefer with the Provent-a-Mite, and allow that to dry for at least 30 minutes before introducing the snake into the cage again. You should repeat the treatment (The Provent) every two weeks until no more mites are detected.
Dave Barker has some very good advice on the VPI site as well. Check out the mite discussion.
Do not spray the Provent on the snake!
-Angel
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In life you can fall many times, but you're only a failure, if you don't try to get back up!
Evil Canevil