Seaweed — Food safety facts
Feed with care · Cats · full breakdown on the linked food page
Very high in iodine and salt. Small amounts occasionally.
The full verdict, portion guidance and serving notes are collected on the Seaweed food facts page.
Short answer
Watch closely for signs of salt and iodine overload, which are the main concerns with a large seaweed ingestion. You might see increased thirst and urination, vomiting, diarrhea, or a general lack of energy over the next 24-48 hours. Make sure she has plenty of fresh water available. If she shows any of these signs, becomes lethargic, or stops eating, you should call your veterinarian. They may want to check her electrolyte levels to ensure everything returns to normal.