Re: "where the cat goes when it leaves its home(s)"
"have you never wanted to know where the cat goes when it leaves the house? I'd like to know, enough to consider buying such a gadget just to uncover the secret life of my cat..."
BBC TV, June 2013: Horizon: Secret life of the cat: the science of tracking our pets.
Highlights on iPlayer: http://www.bbc.co.uk/programmes/b02xcvhw
Modern versions of the tracking kit, with or without cameras, readily available from all the finest online tat shops.