As always, thoughtful and informative responses from the great members at pets.ca
DogDancer, your words remind me of my vet's words, "some dogs will never have good recall due to their prey drive" and I've met other dog owners who've said the same thing about their dogs. Maybe they all recognize something in my Belle... and maybe I'm in denial... all the more reason for me to get some help and see how far I can go with her.
Loki and Luckypenny, thank you for the links to trainer information.
Luckypenny, I'll definitely seriously consider both your recommendations.