Sometimes when my pup is out playing, he prefers to bite on his furniture. I stick a toy in his mouth and praise him. Sometimes this works, sometimes it doesn't. When it doesn't, he ignores the toy and continues biting the furniture. When this happens, I put him in time out, but he doesn't seem to be improving. He also bites the blanket in his playpen, which is where I put him for time out, so I think he may be having trouble distinguishing his blanket from other household fabrics (like the rug or other blankets). Should I remove his blanket until he learns to not things that are not toys? Today I told him very sternly "No" but felt bad because I'm really trying to use positive reinforcement techniques instead... Also, the humping is getting worse. I ignore him and put him in time out, but he doesn't seem to be getting the idea that I do NOT want him to hump my foot, leg, arm, etc. Any advice?