I googled this, and can't seem to find any info on how to fix this. A friend of mine has a smaller than normal chihuaha who is around 4 years old. Two years ago, they introduced a new dog to the family, and since then, the smaller dog has been exhibiting signs of stress. She's gaining a lot of weight (8lbs), although she has always been overweight, but she's also been licking her own feet and hiding a lot. Does this sound like anxiety? I dealt with an overweight (very) dog a few years ago who did the same thing, and her vet said that she was suffering from seperation anxiety. This chihuaha has never been an only dog though, she has (still does) live with a senior mini daschoud(sp). I suggested her staying with me for a while, to see if her behaviour improves any. What do you think?