My son had a pair of geese, we thought a male and female. Last fall one came up missing, he thinks someone came in and took it, as there was no sign of fowl play. The remaining goose/gander has become very territorial. He charges, hisses and has one mean bite, as he will not let go. He/she was not like that, that I recall when there were two, but now that he is the only goose, he is on heavy attack duty. He is part of a flock, chickens, duck and goats. And they all get along fine. But it is tiresome to have to carry a rake or something to hit the ground in front of him to fend off attacks.
He really goes after my son, which puzzles me, as he is the one that feeds them, gives them treats, and takes care of them. I was going to suggest getting a mate for the current one, but as I am not sure of gender, or goose habits, and the thought of having two geese that try to waylay you is not a good one. The other thought I had, was perhaps getting some sort of squirt pistol and maybe some white vinegar and squirting him a couple of times to see if that would change his mind about attacking?
Update on abused goat. I posted here last fall on a poor billy goat that my son adopted. The goat is in good health now, has been neutered, hooves trimmed, horns trimmed and on a good goat diet. He is still a full grown billy and likes to butt, but seems much happier. I don't think he will ever be a goat you can go in and pet, but he tolerates my son handling him. He was so isolated from other goats and humans that his healing process is slow. My son is going to try to socialize him with his doe, by putting them in runs side by side. As the billy was aggressive with the doe. He hopes that someday he will be able to pasture them together as goats are very social.
Any tips on the goose would be much appreciated.