Autumn grazes on grass and eats more grass in a day than dog food. She never once threw it up except when it gets stuck in her throat. She likes it so I never tried to stop her. Anyway I'm sorry to hear that Fritz is feeling under the weather. Maybe it is the weather. If he is drinking water that is good but I'd be inclined to take him in if he doesn't seem to get better soon. I hope he's back to normal soon.