where did you buy this for your dog? on which website???
thanks!

Diatmacious earth won't work if taken internally in food or water. First to understand how it works you need to know what it is. diatamacious earth is the shells of diatoms (frustules) and are made of silica. These are very sharp edged. Insects are small in size but what is important is that they have a large body surface in comparison to their bodies volume. This makes them susceptable to dehydration. The sharp edges of the diatamacious earth gets into the joints of the insects and basically cuts them. This causes them to dehydrate and die. It is very effective when used dry and it can be used on carpets and as a barrier aroudn feed barrels to keep ants out. It will not work once it gets wet it cakes up and the sharp edges aren't exposed anymore. Nobody will probably read this bur oh well ;-)