I’ve mostly photographed dogs, like others have said get down on the ground to their level. Have someone behind you to get the pets attention. Remember they each will have their own personality. My sister has two dogs, one is camera shy, if she sees a camera, she’ll sneak off to another room. The other will roll over onto his back, very submissive. My niece has a dog that will pose when you get the camera out. Crazy! Good luck.