3 Summer Vet Emergencies You Can Mostly Prevent: Algae, Foxtails, and Hot Spots

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July is the busiest month at most vet clinics in the West, and it’s not by accident. It’s blue-green algae bloom season at the low reservoirs, foxtails have dried out and started burrowing, and every damp dog who swims then air-dries in the heat is a hot spot waiting to happen.

These three don’t get as much attention as heatstroke, but ER techs will tell you they cause just as many urgent after-hours visits in mid-July. The good news: all three are mostly preventable with a little route choice and a 10-minute routine after you get home. Here’s what to watch for and what actually helps.

Why These 3 Spike in Mid-July

All three need the same ingredients: heat + water + delayed checking. Algae needs warm, stagnant water to bloom. Foxtails need dry, seeded grasses that catch on fur after a run. Hot spots need moisture trapped against skin plus an itch or scratch that breaks the surface. If you hike and swim the way most of us do in early July — lake in the morning, dry trail on the way back, dog rides home damp — you line them up perfectly.

Think prevention in two places: before you go (where you go, what you bring) and after you get back (dry, inspect, clear). That’s the whole system.

1. Blue-Green Algae: The Green Film You Can’t Let Them Drink

Blue-green algae isn’t algae at all — it’s cyanobacteria that blooms in warm, nutrient-rich, slow-moving water. When it blooms, it can produce toxins that cause liver failure, neuro signs, vomiting, and death in dogs within hours. Small dogs are hit fastest because they ingest more relative to size.

What it looks like

Forget the textbook photo of bright green pea soup. In Utah reservoirs and farm ponds it often looks like green or turquoise paint swirled in the water, foamy scum along the edge, or reddish mats on the bottom in shallow bays. If the water is discolored, smells earthy, or has warnings posted, treat it as hot. Clear mountain lakes above 8,000 ft with good flow are much lower risk than low, warm irrigation reservoirs in July.

How dogs get exposed

They don’t need to swim. Most exposures are drinking while wading, licking algae off fur, or chewing a stick that sat in scum. That dog who loves to snorkel after ducks is at highest risk.

Prevention that works

• Check before you drive. Look up your state’s HAB (harmful algal bloom) reports. In Utah, that’s DEQ’s Utah Lake and reservoir updates. If a waterbody had a warning last week, assume it’s still risky.
• Visual scan at the ramp. Look at the downwind side where scum collects. If you see paint-like streaks, pea-green foam, or dead minnows, leave. Pick flowing water or skip the swim.
• Bring your own water and make it the easy choice. We keep a collapsible dog water bottle with bowl by the door all summer. Offer fresh water every 15-20 minutes so they aren’t tempted to drink lake water.
• Keep a long line near fishing spots. Off-leash in an algae zone is how recalls fail. A 20-ft biothane line on a harness gives splash room but keeps you able to prevent drinking. That’s the same setup we use in our lake day safety pack list vets recommend.
• Rinse even if they didn’t swim. Rinse belly, legs, and paws with clean water at the truck and towel dry. It prevents them licking residue later.

If you think they drank it: Don’t wait for symptoms. Rinse thoroughly with fresh water, keep them from licking, and drive to the vet. Bring a photo of the water if you can. Rapid vomiting, drooling, disorientation, or dark gums after any lake stop = ER now.

2. Foxtails and Grass Awns: The Hitchhikers That Burrow

If you live in the West, you know foxtails. The dried, barbed seed heads of wild barley and foxtail grasses have a one-way arrow shape designed to burrow into soil. They do the same thing in dog fur — forward only, won’t come back out.

Where they hide on dogs

Anywhere hair tufts: between toes, under the collar, armpits, groin, eyelids, inside ears, and under the tail. Sniffy dogs get them in the nose with a sudden sneezing fit. Floppy-eared and double-coated dogs collect them faster, but short-coated trail dogs get them between toes after running through dry cheatgrass.

Our July rule: if you can hear dry grass rattling as you walk through it, it’s foxtail season. In Salt Lake, that is usually late June through August on anything below 6,500 ft that isn’t mowed.

Prevention that works

• Choose route, not just distance. Avoid fields of tall, dry, seed-headed grass after mid-June. Stick to mowed paths, pine-covered higher trails, or early morning when seeds are less likely to be brittle and falling — but route matters more than time.
• Trim, don’t shave. Keep paw tuft fur trimmed short between pads so seeds can’t mat in. Leave the rest of the coat alone; shaving changes thermoregulation.
• Barrier for high-risk dogs. For dogs with a foxtail history, a lightweight dog snood ear cover for foxtails over the ears and a field vest can cut ear and chest seeds dramatically.
• The 3-minute post-trail check. This is the same habit as our 10-minute nose-to-tail tick check routine, just with a foxtail lens: run fingers backward from nose to tail, feel between toes, inside ear flaps, armpits, collar line, and around the vulva/prepuce. Look for a hard swelling or a dog who won’t stop licking one toe.
• Know when to get help. One toe licking obsessively 6 hours after a trail run, a head tilt and ear whine, a swollen eyelid that showed up after a field, sudden violent sneezing — those are vet-today signs. Don’t try to dig deep ear or nose foxtails yourself.

Carry fine-tipped tweezers in your dog first-aid kit for home, car, and trail. You can grab a surface foxtail that hasn’t broken skin, but if the skin is closed over it or it’s deep between toes, let your vet remove it.

3. Hot Spots: The Overnight Ooze Fest Behind Damp Fur

A hot spot (acute moist dermatitis) is bacteria taking advantage of warm, trapped moisture and a break in the skin from scratching, licking, or a small scrape. It starts as a red, damp, painful patch the size of a quarter and can double by morning. Thick-coated dogs, water lovers, and dogs with seasonal allergies get them most.

Why July is prime time

Swim, sit damp in a crate for the drive home, air-dry in humid house, scratch from summer allergies, lick at night — that loop is perfect for hot spots. The same is true for dogs who get a bath and aren’t fully dried. See our guide on how to dry your dog safely after a bath or swim for why undercoat moisture matters so much.

Prevention that works

• Dry fully within 30 minutes. Towel blot first to lift water, then low-heat high-airflow dry or air in front of a fan. Focus on armpits, neck under collar, behind ears, and above the tail — not just the back.
• Break the itch cycle early. If your dog is already scratching, treat the underlying itch instead of the spot. Our breakdown of why dogs can’t stop scratching in summer lists the 7 most common triggers and what helps without over-bathing.
• Don’t over-bathe or trap moisture. Heavy conditioners left in coat plus a wet collar overnight will do it. Remove collars at home to let the neck dry.
• No home surgery. Don’t shave a hot spot in a screaming-painful dog or put peroxide, alcohol, or essential oils on it. Clip the edge if your dog allows, dab dry with dilute chlorhexidine if your vet has approved it before, and use an e-collar to block licking while you get seen. Licking is what turns a small irritation into a crater fast.

The 10-Minute Post-Adventure Routine That Prevents All 3

We do this in the garage before the dog comes in. It covers algae rinse, foxtail hunt, and hot spot prevention in one shot:

1. Offer fresh water first (1 min). Let heart rate come down, then water. This reduces throat drinking urge and obsessive licking.
2. Garage rinse or wipe (3 min). If they swam in anything suspect or even waded, rinse belly, legs, and paws with lukewarm fresh water. If no hose, use a wet towel and then a dry one. Use a dedicated quick-dry microfiber dog towel — it pulls water from undercoat faster than your beach towel.
3. Ears and eyes (2 min). Swimmer’s ears trap moisture. Lift ear flaps, smell (yeasty = brewing infection), and dry flap edges. If your vet has given you an approved ear drying rinse, this is when to use it.
4. Nose-to-tail hands-on (3 min). Fingers against fur: paws (between toes!), ears, armpits, groin, collar line, tail base. Pull any obvious foxtails or ticks now. This replaces guessing with feeling.
5. Final settle (1 min). Collar off to dry, mat in shade, chew in place. A calm dog dries better and licks less. If your dog struggles to settle after summer outings, that calm-down mat plan for busy homes is exactly this moment.

If you find a swollen toe that wasn’t there that morning, a red, wet dime-sized patch that grows, or any algae-related vomiting or drooling — call your vet. Early is cheap and easy. Waiting overnight is not.

FAQ

How do I know if my lake has blue-green algae?

Assume any warm, shallow, slow-moving water in July could. Look for green paint-like streaks, foamy scum along the shore, or clear water with dead fish or a musty smell. Check your state DEQ HAB map before you go, and if the water looks off, skip the swim and offer fresh water from your bottle instead.

What does a foxtail injury look like on a dog?

Most common is one paw licked raw hours after a trail run, with slight swelling between toes. Ear foxtails show as sudden head tilt, whining when you touch the ear, and brown discharge. Nose foxtails cause explosive sneezing. Eye foxtails look like a squinty, teary eye that appeared fast. If you see any of those, get to the vet that day — foxtails migrate deeper.

Can I treat a hot spot at home?

Small, early hot spots sometimes improve if you clip surrounding hair (if your dog allows without pain), keep it clean and dry, and block licking with an e-collar for 24 hours while you call your vet. Don’t use hydrogen peroxide, alcohol, or human hydrocortisone without vet guidance. If it’s growing, oozing, painful, or your dog has a fever or stops eating, that’s a vet visit, not a home fix.

PupPursuit Team

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