Toffee is very curious about the windows open in the summer and he's also somewhat of a sun worshipper. Fudge likes to watch the rain as it falls on the windows during wet weather.
Unfortunately I discovered that Sundar had really bad arthritis.. it flared up mid Winter. Our Winters aren't horrendously cold, but cold enough to make him very unhappy. I've left the electric blanket on on 'his side' of the bed all Winter, but he's going to be so much happier now we've come into Spring.. and maybe he'll need less medication.