Horse meat in 'beef burgers'

There are claims now that dog,cat and rat meat is being found in pet food and perhaps more...

Stray and abandoned dogs taken from the streets of Spain may have ended up in pet food and farm animal feed, it has emerged.
The authorities in Spain have not ruled out the possibility that protein or fats from the carcasses may even have been used in some processed human food.
http://www.dailymail.co.uk/news/article-2289682/Stray-dogs-Spain-used-make-pet-food-farm-animal-feed.html#ixzz2MwhJsQl5