Pets are amazing models and I love rolling on the ground for hours capturing their personality. They are so natural and filled with positive energy that even a long photo shoot is just pure joy. My cats are my models on an everyday basis and I always joke that if I can get them to pose, nothing else is impossible to capture.
When organising a session for dogs I always advise on a location where they can be off leash, alternatively I can remove the leash in the editing process. It's best to have a photo shoot in the afternoon when the light isn't very intensive and adds a warm feeling to the images.
Cats can be easily photographed at home and it's best to do it on a sunny day. However an ideal place for a session for them is an enclosure or a garden with lots of natural light.