We love our four legged and feathered 'children', so we need to be sure and have something special to remember them by when they are gone. This is why I can't stress enough that you should take a lot of photos of them while you can. Often after the pain of loss gives way to happy memories it is decided that a permanent memorial is in order, in the form of an original oil painting. I can tell you from experience that a lot of the time the available photos are lacking in the necessary information needed to do a painting that brings out the best of the beloved pet, and once they are gone of coure, you can't try again.
Another thing that is important for an artist painting your pet's portrait is to have multiple views to reference. Even if one photo is outstanding in every way, it's still two dimensional, and additional views help the artist 'see' that flat image with more dimension. I experienced the help of additional photos with this recently finished painting of one of my favorite clients beloved cat Banju.

"Banju" 8"x8" oil on canvas mounted to board
Banju was no longer with us when the decision was made to do a painting to memorialize him. The photos I received from my client as reference were likely taken with a cell phone, and the collection was necessary for the best result. I am positive that the painting represents him better with me having had access to photos showing several angles than if I'd had only one good photo. So, whether it's a camera or a cell phone or an ipad, get those gadgets out and take some great photos of your pets now,while you can. You will always have them, and if you ever decide to, you will be well prepared to provide an artist with what they need to make your pet come to life in a painting.