Adding vinegar to your dog's water will not prevent it from freezing. To prevent dog water from freezing, consider using a heated water bowl or changing the water frequently to ensure it does not have a chance to freeze.
Animals instinctively drink clean water. Cats and dogs, the two most common pets, need plenty of fresh water daily. Cats are quite finicky about their water and like it fresh. The longer the water sits out, the more oxygen it loses. It won't matter what type of water is used in a pet's bowl if the bowl is not cleaned frequently because bacteria can grow from mold in the air in your pet's bowl. Clean the bowl often and keep it filled with fresh, filtered water. Drinking more water can also reduce urinary tract disorders in cats and dogs.
Salt lowers the freezing temperature of water, which means that it has to be colder for the water to freeze.
It will certainly not keep the water in the bucket from freezing and, if the temperature goes low enough, the bottled salt water will also freeze.
It changes the freezing and boiling point.
Salt
Believe it or not, you can keep water protected in Antarctica by keeping it in a fridge. The temperature is so cold that a fridge could keep it safe from freezing.
Keep your dogs weight in check by having a food bowl and feeding him/her on a set schedule. Free-feeding leads to obesity and health problems. Either a water bowl or dispenser works.
It is possible to keep water as liquid below its freezing point - see related link.
Because alcohol has a lower freezing point than water. By mixing it with water, you lower the waters freezing point. So it keeps the water from freezing on the windshield.
In a location where the temperature does not fall below the freezing point (32 degrees Fahrenheit)
Keep in the refrigerator or if u want it REALLY cold try freezing it