Meeko does this too! he has 2 fleece blankets that he'll just sit there and gnaw on them. He'll be there for hours and all the edges are ruined with holes. It's gotten bad the past few days so I took them away for a few days till I could wash them. I put them both in his little toy box earlier and he went crazy. He's been sitting in his bed with them for a while now. It keeps him quiet but, I wish he didn't do this. It just started outta no where too. He's about 8 months now and he started this a months ago. I wish i knew what made him start this. I try telling him no but, the second I turn my head he goes back to bitting on it.