I have two 16-ish weeks old geese (African Grey/Sebastopol mix), and I am unsure whether they are male or female - maybe y’all can help with that too? I also have three mixed 11-week old ducklings, two females and one male (determined by quacking- pretty certain of their sexes). Anyhow, the geese have recently taken to biting one of my female ducklings and sitting on her in the water. They leave the other one alone. One goose in particular goes after her, and I have had to split them up. The duck runs away but comes right back for more. They all seem too young to be attempting to mate, but what else could this behavior be? I don’t have a pond inside their pen anymore, so they only get in when I am outside with them while they’re out to free range. But I am worried they will hurt her.