Last reviewed: August 2026
Small amounts of cooked spinach are generally fine, but its oxalate content means it shouldn't be a regular, large part of the diet.
Spinach contains oxalic acid, which can interfere with calcium absorption and, in large amounts over time, contribute to kidney stone risk in predisposed dogs. An occasional small serving is not a practical concern for most healthy dogs, but it's not a food to feed in bulk.
General veterinary toxicology consensus, cross-referenced against the Merck Veterinary Manual and ASPCA Animal Poison Control Center food hazard references. See How We Source This for our methodology.
This page is general educational information, not a substitute for veterinary advice.