I'm new to this site and stumbled across this topic. I wanted to let you know why chocolate is dangerous to cats. It contains theobromine, a caffine like substance that in a cats system acts like a stimulate and can cause seizures or heart failure, and can even be fatal. The reaction depends on the amount eaten. My mother has a friend who lost a dog due to eating a bag of chocolate it found, even after being taken to the vet it was too late.

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"As we all know, cats now rule the world."
--John R.F. Breen