When I woke up this morning, I noticed that my 3 month old yellow lab puppy's stomach was much bigger and tighter than usual. I was looking online about this, and thought it could be bloat, but then I looked at the symptoms of bloat and she has none of them. She is acting 100% normal and fun as usual, but it honestly just looks so wierd. I don't want to spend the money going to the vet unless I know that Nala is in trouble. Any help?