A bit of sunshine, and being outdoors for a short time, may help boost his spirits a little. Just keep an eye to make sure it's not too much on him. I don't have the words, but please know my heart goes out to you, and Hector. I've raised, trained, and loved on Hector vicariously, through you. It's like I've been right there with you, enjoying his antics.
I know it's not the same as actually being there, but it still hurts some to hear how he's declining, and nearing the end of his life. This is how it should be. When we're blessed with something/someone special, we should feel their loss. BUT it's better to have enjoyed the blessing, than not have been blessed at all. This too shall pass. The loss is not felt forever. Know that you are not alone, and keep us posted.