Roosters shouldn’t be free range at the moment - all poultry is supposed to be kept under cover against avian ‘flu.
What would I do?
Make one formal complaint to the council planning/buildings dept. about the extension. And one formal complaint to environmental health about the non-compliance with avian flu mitigation stuff.
And then I’d put a line under it.
Different people would no doubt do different things. But for me that would be my line. That would be enough for me to say “well, I tried.” Might make a difference, might not, but it would mean I knew I’d done something about it without it becoming all-consuming.
Why do you think the rest of your family aren’t so bothered by it? It’s not wrong that you are, and it’s not wrong that they aren’t. But maybe looking at some of their own thought processes might help you to change your own mindset?
Definitely get back to enjoying your own garden. Face the other way, plant some screening, sort your garden in the way which works best for you. Personally I’d rather spend the money on new plants than in counselling; they’d bring me pleasure whenever I saw them, and £50 a week or whatever the counselling would cost would bring me a lot of new loveliness in the garden.
But that’s me. I don’t think counselling is a bad plan, and I do think a decent counsellor ought to be able to help you put this into a bit more perspective. So why not give it a go? Speak to a couple, see what they think, go with whichever one you think would be best.
And get some sonic rat repellent plug ins.