Not every dog is a natural swimmer, and even the ones who are can run into trouble in water. Between pool chemicals, lake bacteria, ocean salt, and plain old fatigue, water play has more hidden risks than most pet parents expect. None of this means keeping dogs out of the water — it just means going in prepared. Here's what to know before the next splash.
Know Your Dog's Swimming Ability
Not all dogs are built for water. Breeds like Labradors and spaniels tend to take to it naturally, while bulldogs, pugs, dachshunds, and other short-legged or flat-faced breeds often struggle — their body shape and breathing make swimming tiring or even dangerous. Even strong swimmers can tire out or panic in unfamiliar water.
What to do:
- Start in shallow water and let your dog build confidence gradually — never force it.
- Watch closely any time your dog is in or near water, even if they're experienced.
- For weaker swimmers or new-to-water dogs, a properly fitted life jacket isn't optional — it's the single best safety investment you can make.
Pools: Chemicals and Covers
Backyard pools are convenient, but they come with their own hazards. Chlorine and other pool chemicals can irritate skin and eyes, and pool covers — especially loose or flimsy ones — can trap a dog underneath and create a serious drowning risk.
What to do:
- Keep pool areas gated or barriered when unsupervised.
- Rinse your dog with fresh water after swimming to remove chlorine residue.
- Skip loose pool covers where possible, or make sure your dog can't access the pool area while one is in use.
- Teach your dog where the exit ramp or steps are — panic in water often comes from not knowing how to get out.
Lakes, Rivers, and Ponds: The Hidden Hazards
Natural water looks harmless, but slow-moving or stagnant water is exactly the kind of environment where bacteria and parasites like giardia thrive. Blue-green algae (cyanobacteria) is a growing concern in many regions and can be seriously toxic — even fatal — if ingested, sometimes in small amounts. Rivers add another layer of risk with currents strong enough to sweep a dog off their feet.
What to do:
- Don't let your dog drink from lakes, ponds, or creeks, even though the instinct to lap it up is strong.
- Check local advisories before visiting a lake or beach for any algae bloom warnings.
- Avoid water with a green or blue-green tint, unusual odor, or visible scum.
- Make sure leptospirosis vaccination is current if your dog regularly swims in natural water.
- Watch for sharp debris, fishing hooks, or hidden drop-offs along shorelines.
The Ocean Is a Different Beast
Ocean water looks like just more water, but it's genuinely risky to ingest — seawater's salt content can throw off a dog's electrolyte balance and, in enough quantity, cause serious illness. Rip currents and rough surf add physical risk on top of that.
What to do:
- Discourage repeated sipping of ocean water — if your dog keeps going back for more, it's time for a break and fresh water instead.
- Keep a close eye during rough surf, and use a long leash if currents are a concern.
- Rinse thoroughly after the beach to clear salt and sand, and dry ears well to prevent infection.
Bring Fresh Water, Always
One of the simplest ways to prevent a lot of these problems is also the easiest to overlook: give your dog somewhere better to drink than the pool, lake, or ocean. A dog who has ready access to clean, fresh water throughout the day is a lot less likely to go looking for it in places that aren't safe. Pack a collapsible bowl (or keep a reliable one filled and available at home) so hydration never has to come from a questionable source.
Watch for Trouble After, Not Just During
Some water-related issues don't show up until hours later. Vomiting, diarrhea, unusual lethargy, or excessive thirst after a swim can all be signs your dog picked up something from the water. If symptoms show up in the following day or two, it's worth a call to the vet rather than waiting to see if it passes.
Don't Dampen the Fun
Water play is one of the best parts of a dog's summer — the goal isn't to avoid it, it's to know the hazards well enough that they never become emergencies. A life jacket for weak swimmers, fresh water always on hand, and a little awareness of where you're letting your dog swim covers most of what can go wrong.
Does your dog love the water, or are they more of a paws-on-the-shore type? We'd love to hear about it.