Hydrogel poisoning in dogs: the cooling-mat danger the ASPCA just flagged

Hydrogel poisoning in dogs happens when a dog chews or swallows the gel filling inside consumer cooling mats, hydrogel dog beds, migraine caps, or eye masks. The gel can contain residual acrylamide, a potent neurotoxin. Reported signs include vomiting, tremors, unsteadiness, and seizures. If your dog ate hydrogel, call your veterinarian or ASPCA Poison Control at (888) 426-4435 right away.

What is hydrogel, and why is it in your dog’s products?

Cooling mats are popular because they work without electricity — the gel pad absorbs body heat and feels cool to lie on. That same gel is the problem. According to new ASPCA research, the polyacrylamide gel in these products has traditionally been considered low risk, but testing found some products contain extremely high levels of residual acrylamide. And a “nontoxic” or “medical grade” claim on the packaging does not guarantee the product is safe.

What did the ASPCA study actually find?

On October 6, 2026, the ASPCA released research published in the Journal of the American Veterinary Medical Association (JAVMA) summarizing case data on 45 dogs with suspected acrylamide toxicosis after exposure to consumer hydrogel products. The research was conducted with the Product Injury Coalition, polymer scientists at Cambridge Polymer Group, and a veterinarian at VEG ER for Pets.

The findings that should make every dog owner pay attention:

• Severe and sometimes fatal cases. Dogs developed vomiting, muscle tremors, unsteadiness on their feet, sensitivity to sound or touch, an increased heart rate, seizures — and some died.
• Cases are ongoing. ASPCA Poison Control reports receiving suspected acrylamide toxicosis cases on a weekly basis, across many different brands of migraine caps, eye masks, wraps, and dog beds.
• The levels found were extreme. Tested cooling-gel products contained acrylamide levels of 12,900 to 51,800 ppm — roughly 21 to 86 times the upper end of expected levels (under 1 to 600 ppm), and thousands of times higher than the specification for medical-device grade products.
• There is no antidote. Treatment for acrylamide toxicosis is supportive care aimed at controlling the signs.

Acrylamide can be absorbed through the skin as well as orally and through inhalation, though ingestion from chewing is the primary concern for dogs. Always talk to your veterinarian if you suspect exposure — this article is informational, not medical advice.

Which products can contain hydrogel?

The ASPCA flagged four categories of consumer products:

• Pet cooling mats and pads — the gel-filled pads dogs lie on in summer
• Dog beds with hydrogel filling — some “cooling” beds use the same gel
• Migraine caps, eye masks, and wraps — human products your dog might grab off the couch or nightstand

Packaging language is unreliable. The ASPCA notes that products described as nontoxic or medical grade may still contain extremely high levels of residual acrylamide. If a product contains a gel filling and doesn’t explicitly identify the fill material, treat it with the same caution.

What are the signs of hydrogel poisoning in dogs?

If your dog has been chewing a cooling mat or gel-filled product, watch for:

• Vomiting
• Muscle tremors
• Unsteadiness on the feet
• Sensitivity to sound or touch
• Fast or irregular heart rate
• Seizures

Signs may not appear immediately. Because there is no antidote and neurologic signs can be an emergency, don’t wait to “see how it goes” — contact your vet or ASPCA Poison Control at (888) 426-4435 (note: a consultation fee may apply) as soon as you suspect your dog swallowed gel.

What should you do if your dog chews a cooling mat?

1. Remove the product and any gel fragments from your dog’s mouth (carefully — don’t get bitten).
2. Save the packaging and brand name — the label info helps the vet and poison control assess risk.
3. Do NOT induce vomiting unless your veterinarian specifically tells you to.
4. Call your vet or ASPCA Poison Control (888) 426-4435. If your dog is showing neurologic signs like tremors or seizures, go to the nearest emergency veterinarian immediately.

Not sure whether something your dog ate is dangerous? Use BlueTarg’s free Dog Toxin Checker for a quick read on common household hazards — and always follow up with your vet.

How can you keep your dog safe?

• Supervise chewers. If your dog is a chewer, only let them use a cooling pad while you’re watching. Take it away when you can’t supervise.
• Inspect regularly. Discard any cooling mat, pad, or bed with punctures, tears, or leaking gel.
• Store human products out of reach. Migraine caps, eye masks, and wraps belong in drawers or closed cabinets, not on nightstands or couches where a dog can grab them.
• Read the label — but don’t trust it blindly. “Nontoxic” or “medical grade” claims don’t rule out high residual acrylamide. If a product’s fill material isn’t disclosed, ask the manufacturer or choose one that is.
• Know the safer ways to cool your dog. Shade, fresh water, wet towels on the belly, and cool (not icy) floors work without any gel risk. For persistent heat issues, ask your veterinarian about options suited to your dog.

Frequently asked questions

Can hydrogel poisoning kill a dog?

Yes — the ASPCA’s research documented deaths among the 45 dogs studied with suspected acrylamide toxicosis. Because there is no antidote, severe cases can be fatal even with supportive care, which is why fast veterinary treatment matters.

Is my dog’s cooling mat definitely dangerous?

Not necessarily. Risk depends on the product’s acrylamide levels and whether your dog chews it. A non-chewing dog lying on an intact mat is very different from a puppy gnawing through the casing. Inspect the mat, supervise use, and replace damaged products.

Can dogs absorb acrylamide through the skin?

The ASPCA notes that acrylamide can be absorbed through the skin as well as orally and through inhalation, and it is a potent neurotoxin for both pets and humans. Chewing and ingestion remain the primary concern for dogs.

Does “nontoxic” on the label mean a cooling mat is safe?

No. The ASPCA research found that products described as nontoxic or medical grade may still contain extremely high levels of residual acrylamide. The label claim is not a reliable safety guarantee.

Should I throw away all my dog’s cooling products?

You don’t have to throw everything out. Keep gel products in good condition, use them only under supervision (especially for chewers and puppies), store human hydrogel products out of reach, and act fast — vet or ASPCA Poison Control — if your dog ever eats the gel.