Hi our Black Lab who is almost 10 has always been happy loves to run and play and knows when it's dinner time he is usually waiting wagging his tail but the last 2 weeks he won't eat at dinner time the food will sit until later that night or he will eat it in the morning and he has been drinking a lot of water and has been sluggish peeing a lot like for a long time and he is now throwing up his food what could be wrong.

Only one qualified person to diagnose your dog's illness is a vet. I suggest you get him to one soon. Given that he is l0, he still should not be reacting to food this way. In a human those signs and symptoms of not eating properly, drinking a lot of water and urinating excessively would be signs of diabetes.