✓ Reviewed against PDSA, Blue Cross & Animal PoisonLine guidance · Last reviewed: 2026-09-27
Can dogs eat pickles?
The full picture
Pickles (gherkins, pickled onions, pickled eggs, branston pickle) are all essentially brined foods loaded with salt and vinegar. The sodium content alone is more than a small dog should have in a day, and most pickle recipes include garlic, dill (usually fine), mustard seed, or onion. A single pickle won't poison a dog but it's far from a healthy snack. Branston pickle is especially problematic — contains onion, apple, and lots of sugar/vinegar.
If your dog has already eaten pickles
Most pickles contain onion, garlic, and significant salt — not suitable for dogs. Call your vet if your dog has eaten pickles with these ingredients regularly.
Risks to watch for
- Salt toxicity
- Garlic in many varieties
- Onion in branston and onion pickles
- Vinegar upsets sensitive stomachs
Hidden sources to check
- Burger and hot dog toppings — often a pickle slice or relish dropped or shared without a second thought
- Ploughman's lunch and cheeseboard leftovers — pickled onions and branston are common accompaniments
- Sandwich fillings (particularly deli/sub-style sandwiches with pickle spears)
- Pickle jars left within reach — the brine itself, not just the pickles, is the bigger risk (see below)
Not all pickles are the same — and pickle juice is worse than the pickle
The three common types differ in what they add on top of the base salt problem. Plain dill pickles (cucumber, vinegar, salt, dill) are the least bad of the bunch — dill itself is not toxic to dogs. Bread-and-butter pickles are sweeter and often contain onion and garlic in the brine alongside added sugar. Branston and pickled onion jars are the worst — built around onion as a primary ingredient, not just a seasoning note. If you don't know which type your dog got into, treat it as the worst case.
The brine (pickle juice) itself is a separate and often bigger risk than the pickle piece — it's the salt and garlic/onion compounds in concentrated liquid form, and a dog lapping up spilled brine or drinking from a jar can take on a much higher dose than eating the equivalent amount of solid pickle. As a rough anchor point, one vet-cited guideline puts a sensible daily sodium maximum for a medium dog at around 100mg — a single pickle spear can already exceed that on its own before counting anything else your dog ate that day. Treat any jar or significant brine ingestion as a call to your vet, not just a large solid-pickle intake.
Safe portion size
None.
Safer alternatives
- A plain cucumber slice (the pickle's un-brined starting ingredient, and genuinely safe)
- A small pinch of fresh or dried dill sprinkled on regular food, if you want the dill flavour without the brine
While you're checking what your dog can safely eat, make sure their flea and worm protection is up to date too.