I'm not sure if my 5 month old Pekin is really sick or not. She seems weak and has difficulty walking. I do not see any wounds on her and she was fine when I let her and her coop mates out yesterday. I believe she is eating and I know she is drinking. She will sit and splash/preen in the pool they have, but when its time to get out she has a hard time. She walks as if she is top heavy. Never had ducks before....could she be egg bound? She has not even started laying yet. Not sure what to do......any thoughts?