I have a 10 year old schnoodle that HATES* our 6 month old Pekin ducks. (We have 6). He also hates our two year old Teddy Bear Hamster & he hated our 6 previous hens(a weasel got to them, but we are getting more). He can tolerate them, until I have to go in their pen to change water & such. What can we do?