From time to time, I have a request to combine two of more pets into a single picture plane. That's not difficult, if the pups (or cats) are roughly the same size. I wouldn't try to do a Great Dane and a Chihuahua in the same plane. I would have to make them the same size, and that would look pretty weird.
On this one of Jack and Josie, however, they were same size and combining them worked out well. I can simply take two reference photos and put them in the same picture plane. So if you have multiple pets, I provide this format, plus specials on multiple individual paintings. If you want to try the multiple approach, just contact me.
Thank, and enjoy, and stay safe and well.