I do lurk on this thread and can see why some folks have issues with their birds.
I suggest that folks feed their birds chicken feed and not rely on kitchen food or free range food. Treats don't replace feed.
Also, check for mites, they can run a bird down quickly and kill.
Keep a closed flock if you can - bird from swaps may look healthy, but are a risk even if you quarantine them.
And keep your coop DRY! Deep litter builds up moisture and ammonia.
Don't want to offend - Just stuff I have learned
I suggest that folks feed their birds chicken feed and not rely on kitchen food or free range food. Treats don't replace feed.
Also, check for mites, they can run a bird down quickly and kill.
Keep a closed flock if you can - bird from swaps may look healthy, but are a risk even if you quarantine them.
And keep your coop DRY! Deep litter builds up moisture and ammonia.
Don't want to offend - Just stuff I have learned