They are meant to be eaten. Lola will grind out the marrow first, it will take about a month, and slowly the hard casing goes as well. We will dremel or hammer off small shards that stick out that may be too sharp. If your bully is getting sharp pieces off at the beginning, then the antler is not safe, or maybe is really really old, or not really an antler. they don't normally crack off very easily. A few months per antler is what we go through. we take them away when they get worn down to the point where we can't hold it and Lola can chew at the same time (not that we hold it everytime). We always buy the ones that are split so the marrow shows. Antlers are a hazard for teeth though, Lola had to get a tooth extracted because she cracked it either on an antler or one of those really large super hard nylabones that have a huge knot at the end. Antlers and nylabones are the #1 and #2 reason veterinary dentists have jobs.