Garlic

Yes, garlic is toxic to cats. It contains compounds that cause oxidative damage to red blood cells, leading to hemolytic anemia. Even small amounts — fresh, cooked, powdered, or in supplement form — can be dangerous, and cats are particularly prone to Heinz body anemia from allium ingestion.

Symptoms appear in two waves: GI signs come first — nausea, drooling, vomiting, diarrhea, and abdominal pain. Over the following days, signs of red blood cell damage can develop: lethargy, pale or yellow gums, weakness, fast breathing, elevated heart rate, and dark or blood-tinged urine. Anemia signs may be delayed up to a week after a small ingestion.

GI upset typically appears earliest, sometimes within 24 hours of a large ingestion. After smaller amounts, clinical signs — especially anemia — may not appear for up to a week. Because the delay can be long, do not wait for symptoms before calling your vet; call immediately after any suspected ingestion.

Call ASPCA Animal Poison Control (888-426-4435) or Pet Poison Helpline (855-764-7661) immediately — do not wait for symptoms. Do not give hydrogen peroxide or attempt to induce vomiting yourself; Pet Poison Helpline specifically warns hydrogen peroxide is never safe for cats. Bring any remaining plant material with you if your vet directs you to bring your cat in.

Yes, garlic is potentially toxic to dogs and is significantly more potent than onions. It contains compounds that can cause severe anemia by damaging red blood cells, along with GI symptoms like drooling, abdominal pain, vomiting, and diarrhea. Seek veterinary care promptly if your dog has consumed any amount.

Early signs include drooling, lip-licking, abdominal pain, vomiting, and diarrhea. Over the following hours to days, as red blood cells break down, you may see lethargy, weakness, exercise intolerance, pale gums, fast breathing, rapid heart rate, dark urine, or collapse — all signs of anemia. GI upset typically appears first; anemia signs can be delayed up to a week after small ingestions.

Do not induce vomiting or give any medications on your own — hydrogen peroxide should only be used in dogs under direct veterinary guidance. Call your vet, the ASPCA Animal Poison Control at (888) 426-4435, or Pet Poison Helpline at (855) 764-7661 right away. Bring any remaining garlic or packaging to the appointment so the vet can assess the dose.

Large ingestions can cause clinical signs within 24 hours, while signs from smaller amounts can be delayed up to a week. GI symptoms like vomiting and diarrhea typically appear first; the more dangerous anemia symptoms develop over several days as red blood cells continue to break down. Because of this delayed window, call a poison-control line even if your dog seems fine initially.