How venom triggers stomach upset in a 6 kg cat
Bee venom contains enzymes like phospholipase A2 that disrupt cell membranes, prompting the body to flood with histamine. For a cat this size, even a paw sting can circulate enough venom to irritate the digestive tract—vomiting or diarrhoea means the reaction is systemic, not just local.
Cats often hide discomfort, so diarrhoea may be your first clue. Check the litter box for unusually loose stools within 12 hours of the sting. Other subtle signs include excessive grooming near the sting or refusing favourite treats due to nausea.
Timing of gastrointestinal symptoms
Digestive issues usually start 1–3 hours post-sting as venom spreads. Diarrhoea from stings tends to be sudden and watery, unlike food-related upset. If your cat hasn’t shown signs by the 6-hour mark, they’re likely past the highest risk window.
Persistent vomiting (more than twice in an hour) or bloody diarrhoea warrants an urgent vet visit—dehydration hits small cats fast. A single loose stool with normal energy levels may just need monitoring and extra water offered in a shallow bowl.
Why paw stings affect the gut
Venom enters lymph vessels near the paw, traveling to nodes that activate immune responses impacting the intestines. A 6 kg cat’s smaller body mass means less dilution of toxins compared to a dog—hence diarrhoea from what seems like a minor sting.
Watch for paired symptoms: diarrhoea plus swollen eyelids or wheezing suggests escalating anaphylaxis. Isolated diarrhoea without swelling elsewhere usually resolves with rest, but withhold food for 4–6 hours to let the gut settle.
When to intervene beyond home care
If diarrhoea lasts over 24 hours or your cat becomes lethargic, they risk electrolyte imbalances. Cats under 5 kg dehydrate faster—pinch the skin at the shoulders; slow retraction means vet care is needed for fluids.
Never give human anti-diarrhoea meds, which are toxic to cats. Instead, offer bland food (boiled chicken) after symptoms ease. Cats that strain without passing stool post-diarrhoea may have rectal inflammation—a vet can prescribe cat-safe soothing gels.
The step-by-step response, from the first minute to the vet visit, is in our Bee, Wasp & Hornet Stings emergency guide.