Bests & Worsts Reviews from Amazon

I have sought the advice of Dr. Mercola for a few years now. I have used many of his supplements. But, I have to ask the question, "Why does Mercola use microcrystalline Cellulose.........which is essentially "wood pulp", in their product for Pets??? Which then begs the question -- what kinds of chemicals is needed or used to process "Wood Pulp"? Why would Mercola drop the ball on something that could be entirely avoided? I just can't understand. So....1 star for me. Are Pets second class citizens??? Who is their right mind would willingly ingest "Wood Pulp"? What good reason is this by product needed in such a supplement? ANSWER --- a Filler. Make more money. Thanks, but no thanks Dr. Mercola.