Summer is the season with a genuine killer in it: heat. Everything else - the barbecue, the lake, the grass seeds - is manageable if you know the shape of the risk.
Read this first. This page is a reading checklist, not veterinary advice - we do not give treatment steps or doses, and nothing here replaces a professional. If your pet may have eaten or touched any of these, call your vet or a poison line now, with the packet, plant or product name if you can. In the US: ASPCA Animal Poison Control(888) 426-4435 · Pet Poison Helpline(855) 764-7661.
Heatstroke
Parked cars first - even in the shade, even 'just ten minutes'. Then midday walks, ball-chasing in the sun, and flat-faced breeds doing anything strenuous in warm air.
Signs: Frantic panting, thick drool, brick-red gums, wobbling, vomiting, collapse. Flat-faced dogs, overweight pets and thick coats tip over fastest.
What to do: Heatstroke is a go-now emergency. Get your pet out of the heat and phone your vet or emergency clinic straight away - they will tell you how and when to cool, and when to set off. Do not wait to see whether it settles.
Prevention: Walk at dawn and dusk, test your plans against the day's heat, and treat the parked car as simply off-limits with a pet inside - cracked windows do not change the physics.
Hot pavement
Asphalt in full sun gets far hotter than the air: the American Kennel Club cites data reported in the Journal of the American Medical Association of 135 °F (57 °C) asphalt at an air temperature of 86 °F (30 °C).
Signs: Limping or refusing to walk, licking at feet, pads that look red, blistered or darker than usual after a walk.
What to do: Rinse paws cool and call your vet if pads look burned - burned pads are painful, infection-prone and worth professional care.
Prevention: The hand test from the American Kennel Club's chief veterinarian: rest your hand on the pavement for ten seconds - if it is too hot for your hand, it is too hot for paws. Walk on grass, or walk later.
Blue-green algae
Still, warm water - ponds, lakes and slow rivers in high summer, often with a green scum, paint-like streaks or musty smell. Toxic blooms can kill a dog within hours of a swim.
Signs: Vomiting, drooling, weakness, wobbling or seizures soon after swimming in or drinking from suspect water.
What to do: Rinse the coat if you safely can and go to a vet immediately - this is one of summer's true emergencies.
Prevention: Take local bloom warnings literally, and keep dogs out of any water with surface scum. If in doubt, it is a no-swim day.
The barbecue
Corn cobs and kebab skewers are the classic surgical emergencies; cooked bones splinter; fatty trimmings and greasy scraps trigger pancreatitis; and an unattended plate is an invitation.
Signs: For blockages: repeated vomiting, hunching, straining, no appetite over the following day or two. For pancreatitis: vomiting, a painful belly, lethargy a day or so after the feast.
What to do: If a corn cob, skewer or bone might have gone down, call the clinic now - cobs in particular do not pass and do not show up well on the day. For post-barbecue vomiting or a painful belly, see a vet rather than wait it out.
Prevention: One guest on dog duty, bins with lids, and a house rule that nobody feeds the pets from the grill - however good the eyes are.
Grass seeds (awns)
Dry meadow grass from June onward. The arrow-shaped seeds hook into fur and then travel - between toes, into ears, up noses, under eyelids.
Signs: Sudden violent head-shaking after a walk, explosive sneezing fits, licking one paw obsessively, a swelling between the toes, a suddenly closed weepy eye.
What to do: See your vet - awns migrate one way and rarely come out on their own. The sooner one is found, the shorter its journey has been.
Prevention: Check paws, armpits and ears after every dry-grass walk, and keep the fur between toes and around ears trimmed on feathery breeds.
Snake bites
Heaths, dunes, sunny banks and rock piles in warm months, depending on your region's venomous species - in much of Europe, the adder.
Signs: A sudden yelp, then rapid soft swelling (often a leg or the muzzle), pain, lethargy; sometimes two small punctures you never find under the fur.
What to do: Carry your dog to the car if you can rather than letting it walk, and go straight to a vet. No tourniquets, no cutting, no sucking - the old advice does harm.
Prevention: Keep dogs on the path and on a lead in known adder country during warm months, especially in morning sun when snakes bask.
Open windows and balconies
Summer ventilation season is high-rise season for cats. Screens fail, tilted windows trap, and railings are narrower than a cat's confidence.
Signs: This one is prevention-only: falls injure jaws, chests and legs even from low floors, and a cat caught in a tilted window can be badly hurt struggling.
What to do: After any fall - even one that looked survived - have the cat checked; internal injuries are common and quiet.
Prevention: Proper fitted screens or window guards, never leave a tilt-window open unattended in a cat flat, and net the balcony or keep it closed.
Sunburn
White ear tips, pink noses, thin bellies and freshly clipped coats - the same skin that burns on people, with fewer defences.
Signs: Red, flaky, later crusting ear tips and noses; repeated burns on white cats' ears are a known route to skin cancer.
What to do: If skin is already crusting, ulcerated or not healing, see your vet rather than treating it yourself.
Prevention: Shade during peak hours and, for pets that need it, a pet-appropriate sunscreen chosen with your vet - many human products (zinc oxide especially) are not safe to lick.
This checklist is general awareness information drawn from widely accepted veterinary and poison-control guidance. It is not a diagnosis, a treatment plan or a substitute for professional care, and risks vary with your individual pet, dose and region. In any suspected poisoning or emergency, your first move is to contact a vet or an animal poison line - not to search further.
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