I have a 6 year old female black lab. She is the most faithful eater I know but she has eaten since Tuesday... 6/21/05. All she wants to do is lay around and sleep. Granted it's been hot and I am sure the heat wears on her BUT she always eats. She TELLS me when it's breakfast and dinner time. Her nose is not hot, she isn't breathing weird or anything but she can not keep her eyes open. At this point, she probably doesn't have much energy so that could be one reason she is sleeping but the eating part is really concerning me. I haven't taken her to the vet because I am not sure what they could do. She is drinking water and today she downed some yogurt. However, she couldn't hardly chew her favorite snack... cheesy bones. Any advice? Should I just get her to the vet ASAP?