I started a Group for Pet Photos at Flickr. It allows me to sort my own reference photos for paintings, and you can add any that you would like to share. It's brand new (last night) to be exact, and you probably will see artist friends of mine. Some are members of Art Helping Animals.
If you aren't familiar with flickr, check out the flickr homepage here.
If you want to add photos, first sign up for flickr. Then upload your photos to your own photostream. Then join the Group - here's the link- Andy Mathis Ref Pics
Above each of your photos you will see a "Send to Group" link. Click there and that is it. Enjoy your weekend.