I have a fire pit where I burn tree and yard waste (here in the Pacific Northwest). These two rescued Ancondas have taken to getting in and dabbling for bits of charcoal. Is this harmful? Of course, then when they head for the water dish, the water immediately turns black. They are finally eating more of the the good feed, but still mostly dig in the dirt and loose dry vegetation, along with some greens. I also wonder if they are drawn to the ashes for some of the nutrition they missed earlier. I'm trying to decide if I should put a tarp over the fire pit (until our burn-ban is lifted).