Yes this is my dog. He dived into a muddy ditch, his favourite way to stay cool on summer walks is to submerge himself in mud. He soon realised it was not mud at all, but clay instead and so sat in the ditch forlornly peering up at me until I rescued him.
Needless to say I, also, am covered with dried clay 
Thank god for white dog shampoo is all I have to say 