Nymeria, my imprinted 5 month old duck, is aggressive. She's gotten more aggressive in the last month so I'm thinking it could be due to hormones? She's only recently started biting me, before she would only bite my parents, brother, cats and dogs and even then it wasn't so bad. Now the aggressive towards them has increased. Now in the last week she's even started chasing my feral muscovies when we're outside. She's recently gotten aggressive over her pool, water bowl and food bowl too. And random things make her aggressive e.g she'll see me wearing a new shirt and start attacking me over it. I've never dealt with such aggression before (with other ducks I usually just have to say 'no' and they stop biting) so I'm not really sure what the best training method would be. Anyone have any tips? I was thinking positive training i.e if she stops pursuing family members when I tell her to I could praise her and give her a treat.