Willie has this issue. It's the worst thing I've ever smelled from a dog in my life. Like a combo of fish and rancid grease. It's unmistakeable. I've bulked up his dry food with additional fiber to try to help with it, but when his stools get too bulky, then the gets constipated, so it's a delicate balance. But it's definitely the most unpleasant smell. When we do see the droplets on, say fabric, it's a bright greenish yellow. And then he always tries to clean it up, so then his breath is fabulous. Ick.