I'm no expert but that is a long time for them to be crated, all day and all night. I can't give you any advice because we are retired and with our dogs all the time, but we used to crate ours at night and now one of them sleeps with us and the other sleeps where ever he wants which is the couch. Is there a possiblity that you could gate a kitchen or a room where they could be during the day so they didn't have to be in the crate so long?
Jackie, Perry and Miss Daisy