If it's a natural one then it won't cause any harm
Although I'm in the UK, I once made a vegetable dye for a tp house I made. For the reddy-pink colour I wanted I blended some beetroot, added a bit of flour to thicken it up and had a ready-made hamster-safe paint that cost me 50p
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Minion to Daisy, Lily, Harry and Peanut <3
Gone but never forgotten
Willow - 18:27 18th November 2016