In The Netherlands, raccoons and 'possums are generally not found (species found primarily in the US) so no worries. Stray cats etc. are not likely to find my chickens, because the back garden is closed off by buildings and almost impossible to get in to, even for cats. Cats are also very well...
I built a small chicken coop for my 2 chickens. As we live in an urban area, no need to close off the run. Blue and white matches the colour of the windows of our house!