Ahleha
Yes it can be done but think about all the post-processing work you'll have to do simply to avoid the task of setting up a muslin backdrop for the shoot.

If you have 10' by 10' as a shooting area in the store, you have plenty of space for a backdrop and lighting whether on-camera or off.

Backdrops can either be purchased or simply made by purchasing the muslin in a 10' by 10' or 10' by 12' size and dying or tie-dying it. Tie-dying is the 60's trick of tying the muslin in knots so the dye covers the fabric unevenly.

To use the digital backdrops, you'll have to cut out all the dogs and since they have fur, that isn't as easy as it sounds even if you have software help. Ultimately, it'll take you 20 or 30 minutes per dog to cut it out accurately unless you're a PhotoShop wiz. That's a lot of time spent on the backend that you wouldn't have to invest if you had a backdrop.

Those are my thoughts. Good luck in your decisions.

Jim