@myhrhelper this is a response to your challenge somewhat as i changed the background by photoshop but didn't use another one.
I plan to do another response for the mirrors chalnge

He is posing for you so nicely. Looks good

Great looking canine companion

I don’t know how often you use photoshop and replace backgrounds so you may already know this but one thing that helped me a lot is I go to the quick selection tool and before I process I make sure the select subject is checked. Wow that has been a huge help for me. I struggled selecting a subject in the past. Then you make sure you download a background in photoshop in a separate tab. The I go back to the original picture I select subject and select the move tool. Drag the selected subject to the background page and put it where you want. You can select control T to adjust size