Mussel
CautionMussels are the classic accumulator of saxitoxin, the paralytic shellfish poisoning toxin, and cooking does not destroy it. Plain cooked, debearded, shucked mussel meat is an occasional small treat; the wine-and-garlic broth is not.
This food guide has not been reviewed by a veterinarian. It summarises general information from sources and should not be used to decide whether a food is suitable for an individual dog or to assess an emergency.
Check before feeding
Check the precautions before sharing
Risk depends on preparation, ingredients or amount. Read the precautions below; body weight alone cannot establish a safe portion.
Signs and health concerns
This list includes both observable signs and conditions identified through examination or testing. It cannot establish the cause or whether an exposure is safe.
- Excessive salivation
- Poor coordination or balance
- Weakness
- Difficulty breathing
- Vomiting
- Diarrhoea
- Choking
- Intestinal blockage
- Broken tooth
More about this food
Mussels show up on both sides of the ledger for dogs. Green-lipped mussel powder is a common ingredient in joint supplements, but that is a processed, tested raw material made to a spec. The mussels in your kitchen are a different thing.
The biggest hazard is biotoxin. The Merck Veterinary Manual identifies saxitoxin as the cause of paralytic shellfish poisoning after ingestion of marine bivalves, and mussels are the species state health departments watch most closely when they issue PSP closures. Cooking does not destroy saxitoxin. The signs are neurologic rather than gastrointestinal: drooling, weakness that starts in the hind end, ataxia, and in severe cases respiratory paralysis. If you harvested mussels off pilings, rocks or a jetty yourself, do not give any to the dog, and check your state's shellfish biotoxin advisories before you eat them either.
Second, the shell and the beard. Mussel shells split into thin sharp shards that fracture teeth and cut the esophagus, and they do not digest. The byssal beard is tough indigestible fiber that can ball up in the gut. The common accident is not table feeding at all, it is the dog getting into the bowl of empty shells after dinner.
Third, the recipe. Moules marinière is white wine, butter, shallot and garlic. Mussels in a seafood boil come loaded with salt and spice. Onion, shallot and garlic are all Allium species and all toxic to dogs, so pulling the mussels out of the pot is not a fix. Raw mussels are off the list separately, for bacteria.
What is allowed is narrow: shucked, debearded, boiled or steamed plain with nothing added, chopped small, occasionally, with all treats inside 10% of daily calories. If your dog swallowed shells, ate mussels you harvested yourself, or is drooling, staggering or breathing shallowly after eating shellfish, call your veterinarian or an emergency clinic now, or the ASPCA Animal Poison Control Center at (888) 426-4435. Do not induce vomiting at home.
Frequently asked questions
- Can my dog have the mussels from moules marinière?
- No. That broth is wine, butter, shallot and garlic, and the mussel meat has soaked in it. Shallot and garlic are Allium species and toxic to dogs. Steam a few mussels plain and separate if you want to share.
- Green-lipped mussel supplements are sold for dogs. Is that the same thing?
- Not the same. Veterinary green-lipped mussel products use a processed, tested raw material, not kitchen shellfish. Talk to your vet before starting one, especially if your dog is already on anti-inflammatories, and do not split a human supplement to dose a dog.
- I boiled the mussels I collected. Doesn't that make them safe?
- Boiling handles bacteria but not biotoxin. Saxitoxin survives cooking, which is why states close beds rather than telling people to cook longer. Check the shellfish biotoxin advisory for that water, and call your vet immediately if you see drooling, hind-limb weakness, staggering or labored breathing.