One thing about collies is, they're all different!
Before I farmed and had my own sheep and collies to work them, I used to train my companion dogs exactly as jaykay describes. My dogs knew it was naughty to look at sheep and would come a-running back to me if they so much as glimpsed one.
But I have to say, I wouldn't do it that way now with one I want to work sheep, especially a bitch.
Firstly, ith, I would not stop her stalking anything she wants to stalk. She's honing her skills, and it would be hard for her to know why sometimes stalking is good and sometimes bad. Chances are, if she obsesses with the chooks and stalks them, she probably won't take it to the next step and rush at them, so then there isn't a problem. (Dot still stalks our chooks at 5 years old; she's never harmed a feather.)
If she does rush at them, do not shout at or throw anything
at her, but threaten the ground
between her and the chooks. So that she would have to leave a place where no-one is shouting at her or threatening her to move into a place where both of those things are happening. 99.99% of the time, possibly more, they won't do it.
I do think that working collies are different to other working dogs. They alone work with a large number of sentient, lively and usually fit and active other animals, whom the collie must not hurt. The relationship between dog and handler is different - very different - to that with a dog you are doing obedience, or agility, or even field trials, with. You are very much a partnership; sometimes you will instruct the dog but for the most part your input is guidance and advice - making suggestions rather than commanding a specific action. Most of your training focusses on building patterns of behaviour in the dog where it generally finds it more pleasant and rewarding to follow your advice than to ignore it. (And to a working collie, 'reward' means controlling sheep. 'Good dog' just doesn't compare to holding sheep in your thrawl

)
And let me say this, too - starting with working collies as an adult, ith, you, like me, will never know as much about how sheep behave as that pup does already. So a partnership you will need to be - when it comes to real work, Meg will often know exactly what to do, and have done it, before you even realise a sheep was about to break

Before I say more, however, can I suggest you get your neighbour's take on this? Since you will be getting training from him, even if his approach is very different to mine or any of your other TAS advisors, you would be best to go along with his approach or you and the dog will soon become confused! As with training any dog, consistency matters more than almost anything else.
