I think that my 6 month old puppy might be sick. She is lying around all day and when I came home and opened her crate she didn't even raise her head. Usually the minute I walk in the door she is sitting up and ready to come out. I also tried twice to take her outside. The first time she went right back into her crate and layed down. The second time I was able to take her for a short walk. She did play a little bit, but not to the intensity that she normally does. On a side note this morning we were walking and saw a neighbors dog that we know well. We went up to the dog who was tied up and the dog snapped at my puppy. My puppy wailed and we left immediately, there is no signs of any bite marks or blood. Is this all related? Am I being paranoid? Any help would be greatly appreicated.