It is thought that elements in bogwood, particularly lignin, may form an essential part of Bristlenose diet. Certainly they have the immensely long guts common to vegetarians, and although they fall avidly on the occasional meal of live food or prawns, the bulk of their diet must be composed of vegetable matter. If a high protein diet is fed constantly, then they will become prone to stomach disorders. Vegetable roughage keeps the gut in working order, and bogwood is a valuable addition to this.