We used to own a Deli for a number of years, and this lady came in every afternoon and bought 2 Freddo's. I did not take any notice, until one day she came in upset. She was the owner of a little Silkie and a Collie. The Silkie died and the Collie was in a serious condition at the vets. She told me that the Vet said it was caused through the massive amounts of chocolate she fed them.
I always felt bad for selling her those Freddo's every day for years.