^ I feel slightly sorry for the black dog on the far right. He looks like he's timidly deciding whether or not to push in, or instead slink off, only for Acrodog to scare him off swiftly.
Actually, something similar is true for the black dog on the far left.
As for grey, he has a slight WTF? look, but isn't going to let it put him off, and the remaining two aren't fazed at all.