I have a beautiful, wonderful, amazing, adorable 22-yr-old cat who went blind in the last few months (vet says he can see a little light and dark). I am moving to a new home, 1500 sq ft, in the spring. I am home most of the time. How can I go about helping him adjust? Also, should I restrict him to the bedroom, or will he be able to learn the entire house? (All the windows have screens to keep him inside, we are real careful about that.)