Pickles — Food safety facts
Feed with care · Cats · full breakdown on the linked food page
Vinegar, salt and often garlic/dill seeds — plain cucumber is the better choice. A tiny piece rarely hurts.
Short answer
A tiny piece of dill pickle is unlikely to be dangerous for your cat, but it should be given only in very small amounts. Pickles contain vinegar, salt, and sometimes garlic or dill seeds, which can irritate a cat’s stomach. Plain cucumber is a safer option if you want a crunchy snack. Watch for vomiting, diarrhea, or excessive thirst after they eat it. If any of those signs appear, contact your veterinarian.