My three month BD tries to eat stones in the garden. The largest he has tried was about 1cm long and wide. I have to move them out the way but he managed to get some. Then he looks at the ones trapped in the concrete and tries to dig them out and eat them. He is just under 30cm long (snout to tip of tail) and the vet agrees that it looks male. He has sprinkled on his veg ARKVITS three times a week and Calci-Dust four times a week. I know some animals that can’t chew plant material well like ostriches, other birds and some dinosaurs swallow stones to help grind up rough vegetation. Could this be it? The veg he gets is curly kale, pepper, dandelion leaves and sometimes grass. And the bugs are hoppers, crickets, meal worms, the beetle, sometimes small edible snails and earth worms and as a treat wax worms