Jam / jelly — Food safety facts
Feed with care · Cats · full breakdown on the linked food page
Sugar, and sugar-free versions may use xylitol. Grape jam adds grape toxicity.
Dogs and cats carry the same rating (Feed with care), so the notes below hold for either pet.
Jam / jelly is not poisonous to cats, but it is easy to over-feed. Rich fat, salt or seasoning can bring on vomiting or diarrhoea within a day, and repeated large portions are a recognised trigger for pancreatitis.
If it ate some before you noticed, watch for vomiting, diarrhoea, loss of appetite, unusual tiredness or a painful, swollen abdomen over the next 24 hours. A one-off small amount in a healthy adult usually passes with water and rest; repeated exposure, a puppy or kitten, a senior, or a pet with an ongoing illness is a reason to call your vet the same day.
Why these cautions matter
Even a gram or two of xylitol can trigger a sharp drop in a dog's blood sugar, and larger exposures go on to damage the liver.
Grapes and raisins are linked to kidney failure in dogs, and no safe amount is reliable — some pets react after only a few.
Added sugar brings empty calories, and over months that means weight gain and dental disease — both far harder to undo than to avoid.
The full verdict, portion guidance and serving notes are collected on the Jam / jelly food facts page.