Disclaimer: Always check with your vet on what “human foods” your cat can and cannot eat as information may vary based on their dietary needs and health conditions.
Can cats eat seaweed? Your cat might have seen videos of other owners making a sushi omakase for their cats and sent you a link to it. As a responsible cat parent who’d want nothing but the best for their cats, of course you’d scour the internet for cat-safe sushi recipes. Which then makes you wonder whether cats would like seaweed and is it actually good for them?
Before you construct your maki roll, read on to learn more about the benefits of seaweed for cats, how much they should be eating and some fun ways to incorporate it into your cats diet.
Table of Contents
Can cats eat seaweed?
So is seaweed safe for cats?
Yes, seaweed can be good for cats in small amounts! It contains beneficial nutrients like:
- odine: supports thyroid health.
- Omega-3 Fatty Acids: good for skin, coat and inflammation
- Prebiotic Fiber: aids digestion and gut health
- Vitamins & Minerals: provides iron, magnesium, and antioxidants
However, it should always be plain and unseasoned—no salt, soy sauce, or spicy seasonings (like in flavored nori snacks). Too much iodine can also be harmful, especially for cats with thyroid issues, so moderation is key.
If your cat enjoys seaweed, you can offer a small amount occasionally as a treat or mix it into their food.
Is seaweed bad for cats?
Seaweed is generally not bad for cats as long as it’s given in moderation and is plain and unseasoned.
However, there are a few risks to keep in mind:
- Too nuch Iodine: excess iodine can cause thyroid problems, especially in cats with pre-existing thyroid issues.
- Salt & Seasonings: many seaweed snacks contain salt, soy sauce, or flavorings (like wasabi or chili), which are harmful to cats.
- Digestive upset: some cats may have sensitive stomachs and could experience vomiting or diarrhea if they eat too much.
- Additives & contaminants: some commercial seaweed products may contain preservatives or heavy metals that aren’t safe for pets.
Which is why at Petchef, we ensure that all the ingredients that go into your cat’s meal is made for obligate carnivores! All the meals tailored for cats contain:
It’s completely free of preservatives, additives, fillers and grains! If you’d love for your cat to eat the food they were born to eat, come have a chat with our friendly pet nutritionist to find the ideal meal for your pet
If you want to feed seaweed to your cat, stick to plain, fresh, or dried seaweed in small amounts. Better yet, those specially sourced and processed for pets!
How to tell when your cat had too much seaweed?
If a cat eats too much seaweed, they may show signs of digestive issues or other health concerns. Watch for these symptoms:
- Digestive upset: diarrhea, loose stools or vomiting
- Lethargy: your cat seems more tired than usual if their stomach is bothering them
- Reduced appetite: they might avoid food (even their favorite treats) if they’re feeling bloated or nauseous
- Excessive thirst: if the seaweed had too much salt
- Changes in thyroid health: over time, too much iodine may cause hyperthyroidism or hypothyroidism (weight loss, excessive hunger, increased activity, or hair loss)
If your cat shows any of these signs, keep them hydrated and avoid offering any more seaweed or treats for a day or two. If symptoms are severe or don’t resolve within 24 hours, it’s best to consult your vet for advice.
However, if your cat ate a large amount of seasoned or salty seaweed, contact your vet ASAP.
How much seaweed can cats eat?
Cats can eat a small amount of plain, unseasoned seaweed occasionally (not daily) as a treat. Here’s a general guideline:
- Dried seaweed (like nori): about a fingertip-sized piece (1-2 cm²)
- Fresh seaweed: a tiny pinch, chopped up and mixed into their food
- Powdered seaweed: a light sprinkle, around ¼ teaspoon
A general rule of thumb is that treats should not exceed 10% of their total daily caloric intake. If your cat has thyroid issues, consult a vet before feeding seaweed to it.
How often can cats eat seaweed?
Cats can eat seaweed in moderation, about once or twice a week as a treat. Since seaweed is rich in iodine and fiber, too much can upset a cat’s thyroid or digestion as they are obligate carnivores. Here are some tips for offering seaweed in moderation:
If your cat enjoys it and handles it well, occasional seaweed treats can be a fun, nutritious addition!
How to feed your cat seaweed
Follow these steps to help ensure watermelon are a safe, enjoyable snack for your cat:
