I just had that same issue. one of my girls didnt get filled the other night. It was in the corner and Ithought I got to her.And saw that same site. She drank up a couple gallons and went back to normal by the end of her day. plants may take a lil while to get enough moisture to get their leafs back upright. Have they went back yet? if not give them a few hours they should bounce back or at least show signs of coming back.