I totally agree with Roman. I trust everyone understands that I was only kidding about "Rottweilers" or "dogs" as themes. I agree that keeping the theme as broad as possible is the best way to ensure maximum participation -- which I believe is the objective of these challenges.
Roman, hope you're feeling better. Shooting a wedding under any conditions is hot enough without it being outdoors and 97 degrees. Been there and I can truly feel your pain.