Goodness, I have 5 geese, 2 ganders, a number of muscovies and chickens, all mix together in about an acre. The only time I get bullying is at feed-time, when the geese try to chase the others away. The others, including hens with chicks, just learn to scoot off to the other piles of food (I spread it about because of the competition). The geese are perfectly behaved with the chicks, just curious, as they are with new muscovy ducklings. Very funny to watch their curiosity, but they never try to hurt the little ones. They just bully the ducks and chickens by grabbing tail feathers to see them off the food. I have one muscovy hen that tries to stand up to the geese. Sometimes they back off, sometimes not, but nothing ever serious. Today the muscovy drake gave the older gander a dose of his own medicine and the geese moved off mumbling among themselves.
I raised 3 geese from the age of 2 days, the others were raised naturally, and they all behave much the same towards the other birds,. They are entering the breeding season, 2 geese have started laying. we´re going into winter here, weird how they wait until the winter, so I will keep an eye on things now I´ve read what has happened with some. What sad experiences.