shaking cats, most from shelters, shot by a photographer who let animals get under her skin. sabertooth tiger, three-headed dog here. reporter: carly davidson was inspired by her beloved slobbering mastiff, norbert, since departed. i would be on a stepladder cleaning his drool off the walls. reporter: she took norbertha s photo shaking. face everywhere, tongue over here, drool over there. reporter: and when humans drooled over her photos, she had found her niche. so how do you get cats to shake? well, they did not squirt them. we captured the shake when we would clean their ears. reporter: adding a drop or two of special ear cleaner. or just itch their ears. you know when you rub their cat s ears. reporter: for many furry mammals, shaking is an incredible drying mechanism. rats shake about 18 times a second versus 4 times a second for dogs.