Thanks very much for the replies...and peace of mind that comes with it!! I know that Saturday night, he drank quite a bit so it's not an issue of him not knowing how to drink. I have given him quite a bit of lettuce and carrots and that is probably sufficient. Our kitchen is quite cool as well.

I've never even heard of the word "crepuscular"...I'm glad to know it now.

On a side note: I introduced parsley last night, to which he most assuredly wriggled up his nose in disgust! I will keep offering it though, and maybe one of these days he will decide to nibble it and just maybe even enjoy it.