If you've ever taken your dog out in the snow, chances are that they sneaked a lick (or a chomp) of the cold stuff. But why do dogs eat snow? And is it safe? If you've ever been concerned that your dog ate snow, here's what you need to know.

Why Do Dogs Eat Snow?

Only dogs know for certain why they enjoy eating snow, but there are several possible reasons for the behavior:

• They're thirsty: Unless you've just filled your pup's water bowl, their water might not be the freshest. But it doesn't get much fresher or cleaner than newly fallen snow.
• It's in their DNA: Before dogs were domesticated, their ancestors in colder climates often had to rely on eating snow to hydrate. It is possible that that innate behavior still exists coded in their DNA thousands of years later.
• They have a health condition: If your pooch eats snow obsessively, check with your veterinarian. It could be a sign of Cushing's disease or thyroid or kidney problems, says Petful. PetHelpful adds that some dogs eat snow for the same reason they eat grass: to induce vomiting in order to settle an upset stomach.
• They just like it: It's probably curiosity that first prompts a dog to nibble on snow. Whether it's the taste, the texture or the cold sensation, something about that first bite provides enough pleasure to encourage them to keep doing it.

Is It Safe for Dogs to Eat Snow?

As long as the snow is clean, it's safe for dogs to eat in small quantities. The danger comes primarily from toxic substances, such as ice melt or antifreeze, that might contaminate the snow. And eating snow in large quantities could dangerously lower your dog's body temperature.

Another danger is that your dog might bite down on or consume harmful objects, such as sticks, rocks or trash that's buried beneath the snow. These could break teeth, cause choking or, if swallowed, cause intestinal damage or blockage that could necessitate surgery.

Never let your dog eat dirty, discolored or partially melted snow, or snow that covers roads, sidewalks or other heavily trafficked areas. And under no circumstances should you allow your dog to eat snow that's been driven on or piled up by a snowplow. If your dog ate snow that gives you cause for concern, give your vet a call.