Seems like a powder that you mix into feed, not water (unless you have a different product).
From the coastalag website: "Promotes normal intestinal health. Contains pumpkin seed, diatomaceous earth and 5 strains of microencapsulated lactobacillus. This is for the back yard chicken rancher. This container is labeled to mix 1 to 3 of the 1.5 oz. scoop per pound of feed. So the jar will mix with from 16 to 24 pounds of feed. It is well known that diatomaceous earth and to some degree, pumpkin seed are effective on internal parasites."
In reality, diatomaceous earth is a siliceous powder that works by damaging an insect's exoskeleton and slowly dehydrating it. It is only useful in certain conditions and is absolutely useless for intestinal parasites. At worst, it can damage lungs when inhaled.
SOME strains of SOME pumpkin species have seeds that contain curcurbitin, an amino acid that is somewhat of a dewormer (for SOME parasites). You would, however, have to eat an insane amount of these specific pumpkin seeds for it to be effective in the slightest.
And lastly, the microencapsulated lactobacillus, a fancy name for probiotics.. not harmful, but certainly not something that a healthy, foraging chicken would necessarily need.
