Help! My one and a half year old dog has been vomiting up her food each night. It amounts to a few piles of not completely digested food on the floor at about 5:30 each morning. My husband and I alternate nights for cleanup. This has been happening regularly for about one month and happened a few other times in the month before. What is wrong? What should we do? We don't want to spend hundreds of dollars for a vet to tell us "I don't really know what is wrong with your dog, give her some tums."