he is 4yrs. I had recently gotten back from a walk with him and my other dog. I didn't see him get into anything. Right before he was sick he had disappeared for awhile, but I checked the house and nothing inside was broken into, I also have an 11month old baby and she has free reign so I check frequently. He seems to be doing fine, curled up on his bed, and walks fine. No previous medical condition, although he does have a rash on the right side of his chest about 2inches wide and 3inches long - it looks like wrinkly elbow skin and he won't stop licking it.