I was just thinking about the comments made in a couple of threads about solitary tigers. I have read in a book about tigers in a National Park where a number of tigers were quite happy to live in close proximity to each other, spending time in each others company, including during the day. The researchers thought that the main reason was that it was a small NP surrounded by farms. This was the tigers response to changed conditions. The interesting thing is that the tigers didn't seemed stressed by it, breeding at a natural rate etc. They thought this might be because most of the tigers were closely related and knew it.