By Dial A Vet Veterinary Team
Alfalfa sprouts turn up in salads, wraps and sandwiches, and the odd cat will pick at a stray strand. A small taste is not likely to poison your cat. The bigger issue is hygiene. Raw sprouts are grown in warm, humid conditions that suit bacteria, and food safety agencies in Australia treat them as a higher-risk food. For a cat that gains nothing nutritionally from them, that is a risk without a reward.
Key takeaways
- Alfalfa sprouts are not a recognised feline toxin.
- Raw sprouts can carry E. coli, Listeria and Salmonella, according to the NSW Food Authority.
- Cats are obligate carnivores and get no real benefit from sprouts.
- Kittens, older cats and cats with weakened immune systems are the most vulnerable to food-borne infection.
- Sprouts in a sandwich or salad may come with garlic, onion, dressings or cheese.
- Related reading: vomiting and diarrhoea in cats, kitten diarrhoea.
Why sprouts carry a bacteria risk
Sprouts are germinated seeds, grown in warmth and humidity. The NSW Food Authority explains that raw sprouts can carry E. coli, Listeria and Salmonella, that contamination can start with the seed itself, and that the conditions for sprouting suit food poisoning bacteria. It notes that alfalfa, mung bean and clover sprouts are the ones most commonly linked to food poisoning, and that even very hygienic growing does not guarantee bacteria-free sprouts. Its advice for people is that anyone with lower immunity should avoid raw or lightly cooked sprouts, and that all sprouts should be cooked thoroughly.
Cats can carry and sometimes become ill from bacteria such as Salmonella. A sick cat can also pass bacteria on to the people in the household. That matters in homes with babies, pregnant women, older relatives or anyone with a weakened immune system.
Do cats get anything from alfalfa?
Not in any meaningful way. Cornell's Feline Health Center describes cats as obligate carnivores that rely on nutrients found only in animal products. RSPCA Australia adds that cats lack some of the enzymes and body processes needed to use plant nutrients the way dogs and people do. A complete and balanced cat food already supplies what a healthy cat needs. Sprouts add fibre and water, little else.
Sprouts in mixed foods
Most cats meet alfalfa sprouts as part of something else: a salad roll, a sandwich or a wrap. Check what came with it:
- Garlic, onion, chives or spring onion. The Merck Veterinary Manual describes cats as the species most susceptible to Allium poisoning, which damages red blood cells.
- Dressings and mayonnaise. These are fatty and often contain garlic or onion.
- Cheese and dairy. Many adult cats do not digest lactose well.
- Salty deli meats. Processed meats are high in salt and fat.
Signs to watch for
After a nibble of plain sprouts, most cats show nothing. If bacteria or an upset stomach is involved, you may see:
- Vomiting
- Diarrhoea, sometimes with mucus or blood
- Reduced appetite
- Lethargy or fever
If garlic or onion was part of the meal, watch over the next few days for weakness, pale or yellow gums, fast breathing or reddish-brown urine.
When to call a vet or the Animal Poisons Helpline
Call your vet if your cat has vomiting or diarrhoea that does not settle, blood in the stool, a poor appetite, or seems flat. Call sooner for kittens, older cats, and cats with kidney disease, diabetes or other chronic illness.
Call the Animal Poisons Helpline (1300 869 738) or your vet if the sprouts came in a dish containing garlic, onion, chives or leek.
Seek urgent care for repeated vomiting, collapse, pale gums or trouble breathing.
How vets approach gut upset
Your vet will ask about diet, timing and what else your cat may have eaten. Mild cases often respond to supportive care. Persistent or bloody diarrhoea may prompt stool tests or blood tests. Please do not give human anti-diarrhoea medicines or probiotics without checking with your vet first.
Prevention
- Keep salads and sandwiches covered and out of reach.
- Bin leftover sprouts in a lidded bin.
- Do not use sprouts as a "healthy treat". Choose a small piece of plain cooked meat or a commercial cat treat instead.
- If your cat likes greenery, grow a pot of cat grass.
FAQ
Are home-grown sprouts safer than shop-bought?
Not necessarily. The NSW Food Authority warns that even the most hygienic home growing will not ensure sprouts are free of bacteria.
Can I cook sprouts for my cat?
Cooking reduces bacteria, but your cat still does not need them. A treat made for cats is a better choice.
My cat ate one sprout. What should I do?
Nothing in most cases. Watch for stomach upset over the next day or so.
Is the alfalfa plant toxic to cats?
We could not find a reliable veterinary source listing garden alfalfa as a feline toxin. Like any plant, eating a lot may cause vomiting.
Talk with a vet
If your cat has an upset stomach after raiding a salad or sandwich, a Dial A Vet veterinarian can help you work out whether home care is enough. Book a Dial A Vet consult.
References
- NSW Food Authority. Sprouts.
- Cornell Feline Health Center. Feeding Your Cat.
- RSPCA Knowledgebase. Do cats have special nutritional requirements?.
- Merck Veterinary Manual. Garlic and Onion (Allium spp) Toxicosis in Animals.
- ASPCA Animal Poison Control. People Foods to Avoid Feeding Your Pets.
- Animal Poisons Helpline (Australia, 1300 869 738). Animal Poisons Helpline | 24/7 Pet Poisoning Advice.
Disclaimer: Educational only. This page does not replace an examination or advice from your own veterinarian. If you are worried about your pet right now, contact your local vet or nearest emergency animal hospital.