I know it's natural for puppies to always want to chew on things ... but my puppy likes to put my fingers or hand in his mouth and kind of bite down on them. (which doesnt hurt at all).... Is this normal for puppies also? I have been trying to train her not to but was wondering if this is something they get over when they get older or if its too early to teach a pup not to try and put my fingers/hand in her mouth. Any suggestions would be appreciated. Thanks.