Thatcher has always had a sensitive stomach but today I heard some strange gurgling sounds in it. She didn't eat all of her breakfast and is a little more lethargic but did keep up with me on a 3 mile leashed walk. Her poop was solid. I did let her chew on a bully stick last night which she rarely gets. Think that had anything to do with it? She also just got a clean bill of her from her vet 2 weeks ago. She's 7 years old.