Lots of tricks, but it’s an uphill climb. Soft vs hard mouth is often inherited. Frozen birds, wire spiked training birds, frozen birds, etc will all be recommended. Might help a little. Really, it’s:
1. Work with a good pro. Force fetch, etc.
2. Enjoy the dog and deal with slightly mangled birds.
3. Rehome the dog and start again.
I’ve done 2 and 3. 1 probably makes the most sense. Good luck.
