No doubt Derek is appreciating the "home" feeling - no hospital noises and the feeling of having his family around. He is eating more. He and Airdrie went for a short walk outside the house to the end of the block. Derek knows that excercise and any physical activities promote healing, so is doing as much as he can. Naturally, this is still tiring, and so he also has to rest.
I haven't seen a post in his blog for today. Maybe he'll blog a little later.
In any case, it's great to hear his voice around the house again.