The barking and whining can be normal, but the sheet over crate is something to try and I would think harmless. Myself I would give the little dog another week or so to see if the bark/whine stops by itself. Then sheet can be tried the fan not gonna comment on cause I've never used it.she does bark and whine at night but I assume it's normal as we've only had her for a week. We do take her out obviously but the barking/whining at times is still happening even after we've taken her out. The trainer wants her crate to be like a den and be dark even though our room is dark but this is why she suggested it. She also wants us to have a fan near her.