We have three Cayuga ducks, hatched in May, two are females & one is male. The one female is the same size of the drake but the other female is considerably smaller. Within the last two weeks the two larger ducks have been mating. They also tend to go off foraging together while our smaller girl is left behind. She’ll go after them but she eventually gives up & just does her own thing. There have been a few times when the larger female “pushes” the smaller one. Should we be concerned for our smallest girl? We absolutely love these ducks.