This morning I noticed that Millie had thrown up her food uneaten as well. She has digestive problems so she is on digestive care food. When we last bought her food though we noticed that is wasn't as thick as it normally is. She has been fine up until this morning. I'm wondering could it be the food? She has to go to the vet on the 25th for her shots but if she continues to do this we plan on taking her in for a checkup just to make sure shes ok.