I am helping someone who has an African grey with elevated liver enzymes. All blood tests, and cultures are normal. I recommended Milk thistle, aloe detox and brewers yeast. They are located in Jordan and having a difficult time finding these items. Vets are not real good there. Anyway, she did locate Brewers yeast vitamins for humans in tablet form and asked if she could crush these. I said I would get some more info for her. Any ideas? Thanks!