I am perplexed. I have a poodle named Pogo and a Shih Tzu named Vida. Vida has stopped eating her dog food for some reason. Originally, she would wolf down that stuff no problem. She especially loved to wait until Pogo had finished his meal...and went to eat hers. Then she could growl. (She's not vicious...it's just a random thing she does.) Anyway, in the past week, she has not eaten an entire bowl of food. She has started throwing up and I KNOW it's because she doesn't eat. Is it something wrong with the food? We feed her the high-performance food from Wal-Mart with Twin Pets soft dog food mixed in. She has eaten it before with no issues...but has stopped this week. She wont' even eat the soft dog food by itself? Any ideas? She's not ill, doesn't have a temperature, but was given some Comfortis two days ago, but she had stopped eating before then. She's locked inside the kennel in the bedroom with the food she hasn't eaten.