Sorry you’re feeling so disheartened. It’s difficult at the moment as it’s summer - ‘rabbit season’ as well as bird nesting season! Unfortunately there’s no magic wand which will stop her from hunting – it’s what they are bred to do. With my dogs it is always a case of being super-alert to what may be in the vicinity of any walks. If I am in an unfamiliar area, they are on lead until I know what’s around. In areas we go more regularly, I make sure I watch and listen and when we get to areas where rabbits/ pheasants congregate, they go on lead. But it means making sure I have their attention before they start to chase. Their recalls are pretty good usually, but I cannot compete with their inbred instinct once they are in chase-mode. So it’s up to me to be watchful (and listening!) all the time.
My puppy is being trained differently, and I hope to (one day!) be able to stop him on the whistle. In the meantime, he is not allowed to chase anything and is walked separately from the two adults in ‘gamey’ areas so he doesn’t learn all about chasing from them. Once they have been allowed to chase, and realise how rewarding it is, it is very difficult to change that behaviour. I (or any food reward) will never be more interesting than chasing prey. Even if Pip learns to stop to the whistle, though, I will still have to be alert to what is around as his over-riding drive will be to hunt. It is a case of constantly managing situations and behaviour. Hard work!! But worth it to have a breed with such a zest for life.
Are you able to walk/ exercise Indie somewhere where there are no bunnies/ birds – sports field/ park or similar? Does she like toys/ balls? Could you play ‘find it’ with these? Ollie absolutely loves this and will choose this over a walk/ hike. Playing a game such as this with her may do two things – a) help you (and her) to relax and take a breath, and b) will help with her focus on something other than hunting bunnies/ birds. I find sometimes I get used to walking and hiking as I enjoy that, but my dogs really love close interaction and games and it is great for bonding. So I mix the two up.
Otherwise I might suggest getting in touch with a gundog trainer to see whether you could book a few 1-2-1s – they may be able to help with suggestions on how to perhaps modify your recall/ focus training. A change might help you both as it sounds like the current situation is causing you both a fair amount of stress.
Hope you find a workable, less-stressful solution.