Re: Chipped teeth Ideally dogs (and humans) should have some kind of thorough teeth cleaning experience every 24 hours as plaque takes 24 hours to harden. So, daily is ideal. But I know I'm not quite that diligent and Obi still has clean teeth. Every 2 to 3 days would still be beneficial, if you're not planning on making it a daily thing. If they're cow/lamb leg bones and Simba is a determined chewer I'd supervise a bit and take them away once he's chewed the meat and cartilage/soft ends off. The ideal kinds of bones are ones coverered by meat - think chicken leg + thigh or half a rabbit, not cow/lamb marrow bone.