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What happens if my 25 lb dog gets a teaspoon of dried goji berries mixed into his food every day for weeks?

Dogs · Food safety

Last reviewed: 2026-09-05 · Reference ranges: ASPCA, Pet Poison Helpline & Merck Veterinary Manual

Short answer

Feeding a teaspoon of goji berries daily to a medium-sized dog for weeks is not recommended. While a couple of berries occasionally are not toxic, the cumulative high sugar content can contribute to weight gain and dental issues over time. More importantly, goji berries can interact with certain medications, potentially affecting their effectiveness. It's best to keep this as a very rare treat and watch for any changes in appetite or energy levels.

Goji berry — Food safety facts

Feed with care · Dogs · full breakdown on the linked food page

A couple of dried berries are not toxic, but they can interact with medication and are high in sugar.

Dogs and cats carry the same rating (Feed with care), so the notes below hold for either pet.

Goji berry is not poisonous to dogs, 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

Added sugar brings empty calories, and over months that means weight gain and dental disease — both far harder to undo than to avoid.

Goji berry can turn up now and then, but not as a daily habit: keep the rest of the day's food unchanged and watch the next walk and the stool that comes with it.

The full verdict, portion guidance and serving notes are collected on the Goji berry food facts page.

Open the full food page: Goji berry food facts →