The key word is territorial which in my case means my wonderful geese killed my favorite crested magpie duck the summer before last while I was out fishing for the day. I came home to find feathers in their pond and while raking out the feathers I found my poor girl duck
I keep mine penned separately from all other animals, especially since the reason I became a proud owner of geese was because my first two goosey girls nearly killed their previous owner's beautiful BO rooster named Fred. Mine alert and give me time to see what's going on out in the yard but I would never want them to face an enemy, that is for my dogs and I to do. I don't think my geese would be able to fend off the large Alaskan Ravens once those predators put it in mind to steal young birds because the Ravens work as a team, one distracts, another moves in, etc. I'll never trust my geese w/any of my other fowl, any time of year but it works as long as I keep each pen separate.
