We got a second retired greyhound a month ago and she's lovely, except for the whining. We never had this with our first dog and have no idea how to make her stop. The whining starts about half 5. I go downstairs to let them out but if I try and go back to bed the whining carries on so I tend to stay downstairs so everyone else and can try and get a bit more sleep. She doesn't whine at any other time in the day. How can I break this cycle? Any tips gratefully received.