You touched an interesting artist problem. In the end I agree with you about the method, I think what is very important is to make the client happy without breaking any law of course.          
         
I have heard from many professionals that they have no qualms resorting to using every shortcuts they can think of when deadlines are looming, though it might hurt their artistic integrity.          
         
I think you did a great commission work, when someone's dog died, what the owners want would be to have a piece that resembles their departed loved one. A lovely doggo decorated in a beautiful border <3.          
         
-upvoted-