We were watching the dvd of Charlotte's Web. There is a scene in it where Templeton, the rat tells Wilbur that he is going to eventually become 'sausages'.
"Mummy", says a surprised Miss 7, "Is that what sausages are made from?"
"Yes," I explained, "They can be made from pork or beef or even chicken sometimes".
"Oh," says Miss 7 seriously, "I thought they were made from dog...you know....like 'Hot dogs'!!"