The Antler Chew Co Full Antler XLFull antlers are gathered every year after the deer naturally shed their antlers. They are packed full of tasty minerals and nutrients and contain ash, protein, fibre, calcium, phosphorous, magnesium, iron, sodium and potassium. They also help to keep teeth clean. Full antlers are ideal for experienced chewers as the marrow centre is harder for them to reach, making it more of a challenge. They are also are much less likely to splinter or shatter.