My rottie chews the split ones quite fast ... but she doesn't like the whole as much so I buy her whole antlers then split them when she starts to loose interest. We shipped some "stuff" from overseas recently, among them a moose rack my oldest son got at his 9th birthday almost 30 years ago. Mandy went wild when she smelled it. She did everything she could to get at it, so the son got it back slightly chewed in a couple of places. LOLI saw some that we're split, which are better? Split of whole? Have been thinking about getting some (since they las so long, thr more expensive price for 'dog' antlers wouldn't really be bad) how long do the split ones last?