In most cases, nothing serious happens if a cat eats a maggot. The larvae pass through the digestive tract undigested and come out in the feces. Cats are natural scavengers and groomers, so swallowing the occasional maggot is not uncommon. That said, there are a few real risks worth understanding, especially if your cat ate maggots from rotting meat or a dead animal.
Why Maggots Usually Pass Right Through
When a cat swallows fly larvae, those maggots can’t survive or develop inside the digestive tract. They simply travel through the stomach and intestines and appear in the stool, still undigested. Veterinarians call this pseudomyiasis, a term that essentially means “false infestation.” It looks alarming if you spot wriggling larvae in your cat’s litter box, but it’s not the same as a true parasitic infection. The maggots aren’t feeding on your cat’s tissue or reproducing inside them.
Cats commonly pick up maggots while grooming wounds or licking their fur, or by eating carrion they find outdoors. In all of these situations, the outcome is typically the same: the larvae pass through without causing harm.
The Real Risk: Bacteria on the Maggots
Maggots themselves aren’t toxic, but what they’ve been feeding on can be. Fly larvae thrive on decaying organic matter, and that material is often teeming with harmful bacteria. The pathogens most likely to cause problems include Salmonella, E. coli, Clostridium perfringens (a common cause of food poisoning), and Pseudomonas, which can cause serious infections in the lungs, blood, or urinary tract. Klebsiella, a bacterium associated with fever, chills, and fatigue, is another possibility.
If your cat ate a single maggot off a windowsill, the bacterial load is probably negligible. If your cat got into a garbage bag full of rotting meat or found a dead animal outdoors and ate maggots from the carcass, the risk goes up significantly. The more decayed the source material, the more bacteria your cat was likely exposed to.
Symptoms and When They Appear
Food poisoning symptoms in cats vary depending on the specific bacterium involved. Salmonella symptoms typically show up within 8 to 72 hours. E. coli takes longer, usually two to five days. Listeria can take anywhere from two days to two months, though it’s less common in this context.
Signs to watch for include:
- Vomiting, especially repeated episodes
- Diarrhea, which may be watery or contain blood
- Loss of appetite or refusal to eat
- Lethargy or unusual tiredness
- Fever, which you might notice as warm ears and a dry nose, though a rectal thermometer is the only reliable way to check
A single episode of vomiting after eating something unusual isn’t necessarily an emergency. But if vomiting or diarrhea continues for more than 24 hours, or if your cat becomes noticeably lethargic or stops drinking water, that warrants a vet visit. Kittens, senior cats, and cats with weakened immune systems are more vulnerable to bacterial infections and can decline faster.
Botulism: Rare but Serious
One of the more dangerous possibilities, though uncommon, is botulism. Clostridium botulinum, the bacterium that produces botulism toxin, thrives in decaying animal carcasses. In one documented case, a group of eight cats developed botulism after eating pelican carrion, and four of them died. The bacterium and its toxin were found in the dead bird.
Botulism in cats is extremely rare, but it causes progressive muscle weakness that can affect the ability to walk, swallow, and eventually breathe. If your cat ate maggots from a dead animal and begins showing weakness in the hind legs, difficulty holding up its head, or trouble swallowing within a day or two, seek veterinary care immediately. This is the one scenario where eating maggots can become life-threatening.
Can Maggots Give Cats Worms?
Maggots (fly larvae) are not a known transmission route for tapeworms or other common intestinal parasites in cats. Tapeworm infection in cats happens through swallowing infected fleas during grooming, not through fly larvae. So while finding maggots and worms in the same mental category is natural, they’re separate issues. Eating a maggot won’t give your cat a tapeworm.
That said, if your cat is the type to eat carrion or dig through garbage, it’s worth keeping up with regular deworming, since those same behaviors increase exposure to other parasite sources.
What to Do After Your Cat Eats Maggots
If you saw your cat eat one or two maggots, there’s usually nothing you need to do beyond keeping an eye on them for the next few days. Make sure fresh water is available, since hydration matters if any mild GI upset develops. Monitor their litter box for changes in stool consistency and watch their energy level and appetite.
If the maggots came from a rotting food source or dead animal, the monitoring window is more important. Watch closely for the first 72 hours, which covers the timeline for Salmonella and E. coli symptoms. Note whether your cat is eating and drinking normally. Any combination of repeated vomiting, bloody diarrhea, or refusal to eat or drink calls for professional evaluation.
For outdoor cats who regularly encounter dead animals or garbage, reducing access to those sources is the most effective prevention. Indoor cats occasionally encounter maggots from houseflies that laid eggs on forgotten food, and in those cases, the risk is minimal.