I purchased four new goslings and ducklings to go with the already 19 ducklings. But the 4 goslings are now bullying all the ducklings. They're pecking at their feathers and legs and I don't know if its normal or terrible. These are my first goslings and I did not expect this to happen. Will I have to separate them or will they eventually settle things out. As well my ducklings just recovered from a overheating light bulb so some are less feathered.