Boric acid is considered low to moderately toxic to pets like dogs and cats when ingested, especially in small amounts. Products containing about 5% boric acid are generally not expected to harm pets if used according to instructions, but ingestion of very large amounts of granules can cause poisoning symptoms such as vomiting, diarrhea, lethargy, disorientation, and in severe cases, seizures or respiratory failure. Inhalation or contact can also irritate a pet's eyes and throat. Therefore, boric acid should be stored safely out of pets' reach, and pet owners should use it with caution. If a pet ingests boric acid, veterinary advice should be sought immediately.
Regarding eye use in dogs, dilute boric acid solutions have been used as eye washes for minor irritations, but must be properly diluted and used under veterinarian guidance to avoid irritation or toxicity.
In summary, boric acid is not completely safe for pets if ingested or improperly used, but it can be used safely with proper precautions and veterinary advice.
