You should never invite your dog to join you for a drink. As a matter of fact, don’t drink with your dog.
They might love the taste and you might enjoy seeing them a bit tipsy, but would you enjoy seeing them dead! 
Dogs are much more susceptible to alcohol than the average person. They suffer from the effects of alcohol poisoning much faster than humans. That causes problems like vomiting, dehydration, seizures, difficulty breathing, and even cardiac arrest or coma. I don’t think that’s what anyone wants to see happen just because they gave their pooch a few sips of beer.
Alcoholic beverages contain ethanol, which is toxic to dogs. So are hops, which are found in beer. And it doesn’t take much, especially if you have a smaller dog, to be lethal. It really doesn’t matter what kind of alcoholic beverage a dog drinks. What matters is how much he drinks. And if your dog has a habit of going around lapping up the booze left in your guests’ glasses, it will be difficult to determine how much he has actually consumed.
When trying to make this determination, health and weight are important to consider. According to the American Kennel Club, the published oral lethal dose in dogs is 5.5 to 7.9 g/kg of 100% ethanol. One milliliter of ethanol is equal to 0.789 g.
Dogs also are attracted to fruity drinks. This can cause another problem. Xylitol. This is a substance found in many diet drinks or mixers. If you have tried to cut calories in your cocktails, your dog may unknowingly be drinking poison.
So what should you do if your dog decides to imbibe? Here are some signs of alcohol toxicity. If you notice any, or just think your mutt may have had one too many (and in this case, one is too many), you should immediately get him to the veterinarian, the emergency vet clinic or call the pet poison hotline.
Signs & Symptoms of Alcohol Toxicity in Dogs
- Depression or lethargy
- Incoordination
- Drooling
- Vomiting or retching
- Weakness
- Collapse
- Decreased respiratory rate
- Hypoglycemia (low blood sugar)
- Hypotension (low blood pressure)
- Hypothermia (low body temperature)