I have a black lab/pit bull mix. She is approx. 12 years old and was not taken care of by my parents from the age of 9-about 6 months ago. Over the past few months I've been taking care of her and she's been doing amazingly well. We've seen Increased vitality and energy, and she just seems happier... A couple days ago, she threw up her food, and has done so every time I feed her. She's also up in my face constantly 24/7....This is in no part due to lack of attention because she definitely gets it in my house. We have not changed her food, daily activities, or environment. She has lumps on her body, but she has had those for years. I am wondering if this is just her letting us know its almost her time to go to heaven? or if there is a medical reason behind this? regardless I'll be taking her to the vet once the weekend is over. thanks for any help.