That's not enough! You need to say more about it!
What's toxic to cats and dogs is a substance called
theobromine. They're sensitive to it and it can seriously harm them.
Cats are also very sensitive to tomatoes, or more specifically, the glycoalkaloid tomatine, which is toxic to humans in high concentrations. A single slice of tomato can kill a moderately-sized housecat.
Tomatoes
are a member of the nightshade family, after all.
