I have labs, two 7 year old labs, they are my children. Afew months ago my friend who has austrailian sheperds, went thru the same hing with her male dog. At least it sound like the exact situation by your explanation. Please post and keep us informed!
You definately need to get him to the vet if you haven't already! Is he up to date on his shots? It could be many different things but off the top of my head Parvo comes to mind first. I know with Parvo they will not eat or drink anything, and they will also become very very weak. If it is parvo your pup needs to be started on an iv immediately. If your vet is not open on weekends go get some Pediolyte or Gatorade. Pediolyte has more vitamines in it so that will help him a little more than Gatorade. The main thing is to keep him hydrated until Monday! If you can't get him to drink it, get a medicine syringe for babies. I got one with a rubber tip on the end so it wouldn't scratch the dogs throat. With Parvo they will vomit up whatever is in their stomach so if there is no vomit that is good. But you still need to keep him hydrated until you can get him to a vet! That means if he throws it up, you put more in him. Just a little at a time though. I hope everything goes well, and I hope it's something minor and easy to treat. Please keep us updated.
hope your labrador is ok, did you get him to the vet? I also have a labrador and know that they are strong dogs but when they are poorly it really shows on them. Please post us on how he is doing.
Please get your dog to a vet as soon as possible. If your vet is not opened, then please go to a vet emergency room. I do not know what is wrong with your dog, but if your dog is uncomfortable and seems to be getting worse by the hour, I wouldn't wait until tomorrow....I hope he is ok..please let us know.