I only just found out about the debittered (brewers) yeast that you can give to dogs and cats. Yippee, something natural to get rid of and keep fleas away. How long before it starts to work? Do they have any side effects at the beginning?
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It probably takes about a week, but you can make it work quickly if you brush it on the dog's fur. It should not be a big issue in terms of digestion.
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