Is Mother of Thousands Toxic to Cats?
Also known as: Mexican Hat Plant, Alligator Plant, Devil’s Backbone (shared name), Kalanchoe daigremontiana · Kalanchoe daigremontiana
What makes it toxic
Bufadienolide cardiac glycosides, the same class of heart poison found in toads. They interfere with the heart’s electrical rhythm and can cause fatal arrhythmias; the plant also damages the gut.
Warning signs to watch for
Drooling and vomiting within a few hours, then diarrhea, abdominal pain, weakness, a slow or irregular heartbeat, dilated pupils, tremors and collapse in serious cases.
What to do if your cat eats it
Emergency. Go to a vet or animal ER immediately — do not wait for symptoms. Bring a piece of the plant. Treatment may include induced vomiting, activated charcoal, heart monitoring and IV fluids.
Common questions
Can a single plantlet from this Kalanchoe poison a cat?
A single nibble can, because the baby plants that edge each leaf concentrate the same cardiac glycosides as the parent. Cats also knock plantlets onto the floor and bat them around like toys — there is no trivial exposure.
Is mother of thousands safe if it just hangs out of reach?
No. The plant rains tiny propagules onto the floor, where they root and get chewed. If a cat lives in the home, this plant should not.
Is it related to the flowering kalanchoe sold in stores?
Yes — all Kalanchoe species contain these cardiac glycosides, and florist kalanchoe is toxic too. “Mother of millions” (Kalanchoe delagoensis) is equally dangerous.
More plants checked for cats
This page is general educational information, not a substitute for professional veterinary advice. Every pet is different — if your animal ate something concerning, contact your veterinarian or a pet poison hotline right away. Checking what your pet can eat? Visit our sister site SafeOrToxic.