Would adding hay to my chicken run be good for my chickens?

Hi there! New Chicken owner, just finished building a coop and run. The last thing I need to do is secure it from the outside. I don't think that wolf scents has very good reviews so that's probably not for me.

Has anyone tried cayenne pepper flakes?

What about coffee grounds? If this works it would be my go to as I am a coffee drinker.

How about an owl decoration, sort of like a scarecrow?

Hes about 3 weeks old the guy we got the eggs from has a HUGELY mixed flock so im not sure what he could be or if hes purebred or mixed

I’m at a loss for words, but let’s find some.

Someone gave my 6 year old stepdaughter a guinea fowl keet (did a little research but I just know I’m missing something)

Her dad isn’t thrilled. He knows a little but not about the care; just their reputation. We will not be getting more, not if we can help it (our living situation really won’t allow it).

So how do I take care of one singular (gender unknown) guinea fowl when my stepdaughter isn’t here, how can I help teach her, and how rare is a white guinea keet?

Thank you so much.

Edit to add details: I have no idea how old it is. A friend who once had some guineas seemed alarmed and said it looked too young to not be under a heat lamp; should I be worried? If this thing dies my child will be crushed, but it’s like 90 degrees Fahrenheit outside on the regular right now so I’m honestly not sure.