My dog is sick he is not eating and barely drinking,weak,heart beat is fast and breathing is hard and his tong is kind of dry:confused:

He obviously needs to see a vet. If the dog isn't eating or drinking than 9 times out of 10 its something serious that only a vet visit can solve..

I agree with podoboo, but, seeing as it's the weekend and vets aren't open and many people don't have access to emergency vet care, try the following.

Pedialyte, it can be bought in most drug stores and even Walmart. A syringe full every 10 minutes or so, not too much at a time because you want to make sure your dog is keeping it down. This will help get your dog rehydrated.

Make a vet appointment right away. The pediatlyte will help but your dog needs to be seen by a vet asap, if you have an emergency vet in your area then that's where you need to go.

Good luck.