The stuff I use is Calcium Bentonite (Montmorillonite). Some of what I have is purchased from Dynamite Marketing & the other I have is through Swanson. I'd tell you what it says on the packaging except it's packed away for our up coming move at the end of this month. One thing to be very careful of. I have a friend back home who read the canister that they got from me & determined it's the same kind of Bentonite that you buy at a construction store to plug hole/leaks in ponds. This genius decided to go cheap because he had a horse with a problem & went to a hardware store & bought a 50 pound bag. You can get away with using that stuff topically but NOT internally. If it's used to plug holes in ponds you can bet they're not quality testing it for internal use.
On the Swanson site look at the Redmon Clay which it talks about for internal use. The other types may be fine to ingest but I always err on the side of caution. The trick to clay is that you can not touch any of it with metal or it kills the drawing aspect of the clay. So put it in a glass container & stir it with wood or plastic but not anything metal including your rings. I have a canister of the stuff they use for facials for topical use.
I start out slow so I start out sprinkling just a little on the food like I would salt or pepper. I do this for about a week. If you feed any kind of wet food this is easy. Since mine eat raw I can just sprinkle & go. If the dog is finicky & turns their nose up at it, I mix the clay in water as if I were going to drink it myself (distilled or reverse osmosis water) & clay. I let it sit all night & in the morning I stir & then syringe up some (no needle) & just give it to them that way. For small dogs you might do just 1/4-1/2 cc in the syringe & keep any eye on the dog when they go out to go to the bathroom. For some dogs just a little of the clay water every day or it on their food like this takes care of their tummy & they don't have to go eat weird things. For a bruiser like my giant I'd probably do 2 cc's starting out.
Okay well I love the clay so I have to share this with you. If you get a bug bite, spider bite, snake bite, unidentified weird spot, odd swelling CLAY is the bomb for drawing out toxins through the skin. If your face needs a good cleansing you can use it as a facial. If you burn yourself, just put the clay on the burn. (CAUTION: when that clay hits the burn... you might want to be prepared to avoid wetting your pants because that burned skin will feel like it's burning to the bone... don't rub it or take it off... grit your teeth & bear it). Once that hideous part is over you will be glad you did. Once that clay dries & comes off or you rinse it off sometime later someone may ask, how's your burn & you have to look to see where it is. No pain, no blistering, no peeling. Works like a charm but you gotta cowboy up through that initial part because it's a booger. IF you ever have to use it where there is toxin or venom substance (such as I did when my dog was snake bitten) then you clean the site with peroxide then you use an antibiotic substance to stave off secondary infections then you cover the bite site & fan out so 6-12 inches around the bite site is covered in clay.
Well... as you can tell I LOVE the clay. I've used it internally & externally for dogs, horses, cattle & people (including myself) for years now. The joke in my house is... 'rub some dirt on it'
Kristin, we used pre-mix the clay with water then we'd take maybe a 1/2-1 teaspoon & mix it with a little raw hamburger & probiotics for dogs. I'd make them into little balls & the little dogs got these nightly as their treat. My dogs eat raw so this is normal yet for dogs who don't eat raw, it's not enough to upset their tummy. The enzymes & goodies they get this way is quite healthy & is sometimes the easiest way to deliver clay to a dog who's not keen on eating dirt unless its his/her eyes