Just like why John Deere is green and yellow. 'So you can see it!' My grandfather from North Dakota would say. LOL
My grandpaernts have a barn on their property and its white. I only know it to have chickens. I went up to the top and there are bats up the ass in there. LOL I was just thinking about that the other day and I bet there is so much bat guano you would have to have a professional remove it all. Stuff is toxic.