I attach a pair of photos I took almost a year ago at Twycross Zoo on 1 May 2014. A young snow leopard - I believe it was his first birthday - stood up with his paws on the glass, looking at a child on the other side. The child put his hand against the glass, opposite the snow leopard's paw. As the child moved his hand, the snow leopard moved his paw to match. This game lasted a minute or so, a minute which I guess the child will never forget. Almost a year later on 14th March 2015 I was at Paradise Park in Hertfordshire attending an evening talk, before which we were allowed to wander round the zoo. One of the keepers, aware of my love for cats, advised me that dusk was when they were most responsive and suggested I went round the cat enclosures. When I visited the snow leopard it was almost dark and doubtless he could see much better than I could - and we ended up playing peek-a-boo from either side of the glass. No picture I'm afraid - too dark! I told the keeper about this, thanking him for his suggestion and mentioned my Twycross experience. I then asked him if snow leopards were noted for such playfulness and responsiveness. He said they were - and I now love them inordinately. Is this not an argument that at least some zoo animals with no prospect of being returned to the wild should be encouraged to interact with humans, acting as ambassadors for their species? Their lives would be enriched too.