Thank you for taking the time to give feedback! I appreciate that a lot!
I can see what you mean by fairness. Perhaps timed spawners with an indicator and map of where ducks will spawn soon and the ability to drop meat for the dogs to distract them for 2 minutes while the ducks are evacuated. Then as you are running around maybe another collider for the dog so you know if you are getting too close like a little sniffing sound before getting too close to attack.