Este artículo todavía no está traducido al español, así que se muestra en inglés.
Keeping dogs safe on frozen lakes comes down to two rules: keep your dog on a leash near any ice or open water, and if your dog does fall through, never go onto the ice after them; call 911 and keep your eyes on your dog so crews can find them. The Ontario SPCA and Ottawa Fire Services both give this advice, because owners who try a rescue themselves often end up in the water too.
Ice that looks solid can be thin, especially near moving water, inlets and the shore. This guide covers how thick ice should be, why a dog on a long walk is at risk, what to do in the first minutes after a fall through, and the warming and vet care that come next.
Why ice is so risky for dogs
Dogs don't judge ice. A dog chasing a ball, a duck or another dog can run far out from the shore in seconds, onto ice that can't hold them. The Ontario SPCA warns that fast flowing water weakens ice from below, and asks owners to keep dogs away from places where they may wander onto it.
- Currents under the ice, at rivers, creeks and inlets, weaken it from below.
- White, snowy ice is only about half as strong as clear blue ice.
- Grey ice holds water and is unsafe.
- Snow on top means the ice needs to be even thicker to be safe.
If you wouldn't walk on it yourself, your dog shouldn't be on it either, and many ponds and harbours are never safe.
How thick should ice be?
Ontario Provincial Police ice safety guidance says no activity should take place on ice less than 15 cm thick, rising to 30 cm if the ice is covered by snow. Colour matters too.
| Ice colour | What it means |
|---|---|
| Clear blue | The strongest ice |
| White or opaque (snow ice) | About half as strong as clear blue ice |
| Grey | Unsafe: the grey colour shows water in the ice |
The Ontario SPCA says to check the thickness before stepping onto any frozen surface. In practice most dog owners can't measure ice on a walk, so the simplest rule is to stay on the shore and keep your dog there with you.
Keeping dogs safe on frozen lakes during winter walks
- Leash near ice and open water. Both the Ontario SPCA and Ottawa Fire recommend it.
- Choose routes away from ice. The Ontario SPCA suggests avoiding places where your dog may wander onto ice.
- Never throw balls or sticks toward ice. Play fetch on land, well back from the shore.
- Carry a charged phone. The Ontario SPCA also suggests rope and safety ice picks in case of an emergency.
- Walk by the water in daylight, when you can see the ice and your dog clearly.
- Supervise dogs at the cottage or on lakefront property, where the ice is right outside the door.
A good recall helps, but it isn't a guarantee when a dog is excited. Cold is a risk on its own as well: our guide to how cold is too cold for dogs covers safe walk lengths.
If your dog falls through the ice
Ottawa Fire Services, quoted by the Ontario Association of Fire Chiefs in December 2024, is clear: never go in to try to rescue your pet. Call 911 and do your best to keep your pet in sight so crews can reach them quickly.
- Call 911 right away. Say a dog has gone through the ice and give the exact location.
- Stay off the ice. The Ontario SPCA also warns against putting yourself at risk.
- Keep watching your dog. Note a landmark near where they went in.
- Call to your dog calmly from shore. Some dogs find their own way back toward you.
- Wait for trained rescuers, who have the gear and training to go out safely.
A dog has a better chance with a trained ice rescue team than with an owner who goes through the ice too.
After the rescue: warming up and seeing a vet
A dog that has been in icy water is at risk of hypothermia. The Ontario SPCA lists the signs as prolonged shivering and slow, shallow breathing, and advises wrapping the dog in a blanket, bringing them somewhere warm and getting veterinary care right away.
- Wrap your dog in a dry blanket or towel and get them into a warm car or building.
- Watch for frostbite on the ears, paws and tail. The Ontario SPCA notes the skin may darken.
- Go to a vet or emergency clinic now, even if your dog seems fine, so a vet can check for hypothermia and any other effects of the cold water.
If you're away from home, the find a vet map shows every clinic near you, and our guide on when to take your dog to the emergency vet explains what to expect. Having your dog's records and vaccine history on your phone in the free PetGrid app, under pet records, helps a new clinic act fast.
Preguntas frecuentes
Is it safe to walk my dog on a frozen lake?
Only on ice known to be thick enough, and many lakes and ponds never are. Ontario Provincial Police guidance says no activity on ice under 15 cm thick, or 30 cm if snow covered, and the safest choice is to keep your dog on the shore.
What should I do if my dog falls through the ice?
Call 911, stay off the ice and keep watching your dog. Ottawa Fire Services says owners should never go in to try a rescue themselves.
Can dogs get out of icy water on their own?
Sometimes, but cold water and slippery edges make it hard. Don't count on it; call 911 at once so trained crews can reach your dog quickly.
How do I warm my dog after falling into icy water?
Wrap your dog in a dry blanket and get them somewhere warm, then see a vet right away. The Ontario SPCA lists prolonged shivering and slow, shallow breathing as signs of hypothermia.
What colour ice is safe?
Clear blue ice is the strongest. White snow ice is about half as strong, and grey ice is unsafe because it holds water, according to Ontario Provincial Police guidance.
Should my dog be on leash near frozen ponds?
Yes, keep your dog leashed near ice and open water. The Ontario SPCA and Ottawa Fire both recommend it, because a dog can reach thin ice faster than you can call them back.
En resumen
Keeping dogs safe on frozen lakes means a leash near ice, routes away from the shore and a firm rule that no one goes onto the ice after a dog. Call 911, keep your eyes on your dog, and see a vet after any cold water rescue.
Keep records and your vet's details ready for winter emergencies with the PetGrid app, free for pet owners.
Guarde los historiales, las vacunas y las visitas de su mascota en un solo lugar seguro. La app PetGrid es gratuita para los dueños de mascotas, con o sin clínica.
Get the free PetGrid appFuentes
Cada dato sobre otro producto u organización proviene de estas páginas, consultadas en la fecha indicada.
- Ontario SPCA, The Ontario SPCA urges pet parents to use caution around waterways (Jan 2024) ()
- Ontario Association of Fire Chiefs, Ottawa firefighters respond to three ice rescues involving dogs (Dec 2024) ()
- Ontario Provincial Police ice safety guidance, via SDG Counties (Jan 2022) ()
- Ontario SPCA, Cold weather pet safety tips ()