2 years ago I was able to flip a nice good sized house I'd been paying extra on for 8 years in a primary market into a small paid for house in a secondary market, make the move back to the rural area I was born in, visited all my life. This allowed my husband to work part time. I thought it was going to be awesome, finally slow things down for both of us. We've both always been "over achievers" with too much on our plates by our own choosing really, but I'd been seeing signs it was time to turn the volume down a lot, and am super glad I did see it coming and prepare. Sadly it seems he's decided this "gift" was exclusively for him, and not for me. As soon as we got moved he started sitting in his chase chair and dozing all day. Stopped helping with anything and everything. Fought the idea of working at all. He'd have been stuck full time the rest of his life if I hadn't did what I did and added my small inheritance to make this work, as he absolute crashed our finances behind my back a decade ago. He did take a slow part time job, it's right up the street, Monday-Wednesday. The days he works he seems pretty normal, animated, thinks, talks, pays attention to his 2 large dogs, moves around, lets them out, feeds them their dinner. The 4 days he doesn't work he sits and stares down in-between nodding off, ignores the doggies pleas for attention or a trip outside, says very little, only answers with one word if I try to engage him. As soon as I feed him he's out cold within 20 minutes, solidly asleep for 3 hours. Eats again, back to sleep, he does seem to wake up from about 6 to 9 p.m., then it's bedtime with no alarm set, he'll sleep 10-11 hours, and repeat for the entire 4 day string every week. (?). He's 12 years older than me, but I do have some health issues after having had a pretty tough life. I'm starting to get pretty burnt out being the only responsible adult in the house. If he's perfectly OK the 3 days, why isn't he for the 4 days off? Is he scamming me to get me to do all the work and take all the responsibility, or is this normal for his age? All my Uncles are 10 years older than him and they are all active.
Just tell him your feelings.
Because with just the little you've written here, I think this has less to do with his health, and more to do with your relationship. But by all means, get his health checked first, just don't be surprised if his reasons for sleeping all day aren't health-related.
Perhaps depression? Have you asked him what the heck is going on? Tell him that you need hi to take care of the dogs, do chores, etc. You are still working and can't be doing everything for him. No thanks!
Tell him you're worried about him and want him to have a full work up done. Blood work, visit with primary care doctor, and whatever comes out of that.
Sleep apnea? But that doesn't explain how he can pull it together for 3 days a week?