It's made with 100% natural ingredients. And it has no negative effects (or, if it does, I have not noticed anything). They still poop and pee regularly, the colors and consistency is still the same, it just doesn't stink! Here, this is what the bottle says:
The #1 complaint of pet owners is feces, urine and body odors. Bi-Odor (oops misspelled it in the thread name) Waste Deodorizer will virtually eliminate these odors. Bi-Odor's unique blend of natural ingredients works internally to attack blood urea, thus the stool, urine and body odors are virtually eliminated.
Directions: Blah blah blah.
Money Back Guarantee!
Blah blah blah.
Made With 100% Natural Ingredients
Used and recommended by top breeders and veterinarians nationwide.