This could be anything from your dog bolting his food too fast to an infection to organ failure. I would suggest taking your dog to your veterinarian for an examination; if you can take a picture of what your dog is vomiting up and bring in the dog's water dish along with how often you have to refill it, that would help the veterinarian sort out the problem.
Drinking way to fast
Your dog is gagging after drinking water due to drinking too fast and therefore intaking too much air which can be extremely dangerous, resulting in a condition known generally as bloat, which can be fatal. You can stop a dog drinking too fast, hence reducing the risk of bloat with a special anti-gulp dog bowl. One of the best products around to stop your dog gulping water too fast - i.e. slow them down is the Alpha Paw Drink Better Anti- Gulp dog bowl. This is also a great product to educate pups to drink water more healthier from the start.
Because they drink too much water and they throw it back up because they probably dont have anything else on their stomaches.
If your dog has been drinking a lot of water, checking to see if they are overheated with be the first thing to do. The second thing would be to see if the dog possibly has diabetes.
take it to a vet but usually it is fine or drinking to much water
i would take your dog to the vet, just incase somethink is wrong with him/her.
Get that animal to a vet. Large breeds can suffer from stomach torsion. It is fatal if left untreated.
Yes. They need a lot of water to produce milk.
Yes, you can also die by drinking too much water.
NO, drinking a lot of water after sex will NOT stop you from getting pregnant.
Why do you think your dog is over hydrated? Too much water comsumption? It normal in summer for dogs to drink a lot of water, but.. Too much water drinking can indictate canine diabetes, cushings disease. Is dog leaking pee in the house? Start keeping track of how much water he is drinking, mark bowl with a permanent magic marker so you can tell the vet how much he is drinking per hour etc.
Water Intoxication
It will taste very salty and possibly make you gag. Other than that no harm is done.
No.
Eating a lot, drinking a lot of water and working out.