Balancing colour of photo.

[WigglybumWatson]

Heres Watson, our 9 month pup (awwhh..) who likes to steal plant labels. 

I'm struggling to balance the whole of the image with lighting and colour and I was wondering if anyone can point me in the right direction of how to do this? As you can see the right side of the photo is darker/duller than the left. If I lighten the right hand side it just looks dull and washed out. (Attached the unedited original as a JPEG as RAW is too high MB)

Thank you!

[Ged_Traynor]

@WigglybumWatson you could try generative fill with no prompt, just make a selection of the affected area and apply gen fill

[WigglybumWatson]

Oh I was more meaning the colour of Watson as opposed to the section on the right hand side, I should of been clearer

[WigglybumWatson]

To be more specific, I know how to remove the shaded area of the right hand side. I was more refering to the colour of Watson himself where he is shaded more on the right as opposed to the left.

[D Fosse]

It's really just that the light is coming in from the left, so that the right is in shade. The shade is illuminated by reflected light, perhaps just a blue sky, so cooler than the direct light as well as lower level.

I'd just lift the right side very slightly with a gradient-masked Curves adjustment. Don't overdo it!