TailVilleWhy
Squid and octopus are lean proteins, but they're tough and rubbery, so pets that gulp can get pieces stuck in the throat or gut. Raw squid contains an enzyme that destroys vitamin B1 (thiamine), and cats eating it regularly can develop thiamine deficiency with wobbliness; that's the origin of the Korean saying that squid makes cats' backs 'give out.' Dried squid and seasoned squid strips are very salty and can swell in the stomach after drinking water.
How to give it / if eaten
If you want to share, cook it thoroughly without seasoning and mince it very finely: no more than a teaspoon for cats and small dogs and a tablespoon for large dogs, only occasionally. Don't give raw squid, dried squid, seasoned squid strips or spicy stir-fried squid.
Watch for these signs
Big pieces can cause gagging, repeated vomiting and poor appetite. Lots of dried squid may cause extreme thirst, a swollen belly and vomiting. Cats eating raw squid over time can show thiamine deficiency: wobbliness, a downward head tilt or seizures.
FAQ
Does squid really make a cat's back 'give out'?
Raw squid's thiamine-destroying enzyme can cause vitamin B1 deficiency over time, leading to wobbliness or trouble walking. One small taste won't do it, but raw squid is best avoided.
My dog ate a lot of dried squid.
It's salty, tough and can swell in the stomach. Note the amount and your dog's weight and call your vet right away.
General information only. Weight, age and health conditions change how a pet reacts, so ask your vet if you are worried.