I have 2 ducks and 2 juvenile geese. i want to make my flock free range. The problem is right now i have a huge stray cat population. How can i make this free range work (during the day)? In the summer i have a opossum problem how can i keep the flock safe? Also the geese have problematic wings so one is slipped and the other goose's wing hang down by its side its better than it was but she cant run as fast as the ducks because of this.