It sounds like the switching from wet to dry food might be why he is constipated now. My dogs get constipated even if I switch brands. Maybe soft treats will help put water back to his colon. Make sure he does eat though- he could get hypoglycemic if he doesn't. My Gabby whines and cries if I leave her on the bed and I go into the attached bathroom with the door open-she can still see me. I think over time she will get used to it though. I just always know she misses me!
If I wern't afraid we would roll onto her- we would have her in the bed with us. It's whatever you guys want! Many people here on YT let their babies sleep in their bed! (not human babies!)
LOL