I've heard others say the same, even a friend in a nearby village, so maybe the theory about the following their parents' eating habits is true - interesting!
On a different note, I've been having an impassioned discussion on social media about what to put out as nesting materials for birds. Out in the sticks as we are, there's probably no need because of the abundance of natural materials readily available - sheep's wool, horse hair, feathers, straw, twigs etc. But putting a little something out can't do any harm, right? Unless that little something in itself can cause harm.
I have a problem about tumble dryer lint. I was once told and have recently had it confirmed, that fluff from your dryer can be harmful. So I tend to stick to natural materials only. Here's a link which basically covers all the reasons why...
Does anyone have any opinions, experience, or expertise in this area?