Made a new carpet for the dogs to sit on. Selected the area, chose two brown colors from the source, rendered clouds, added grain and sandstone texture.
Put a new mouth on the white dog and enlarged the eyes using liquify.
Created a line drawing effect on a new layer.
See https://www.youtube.com/watch?v=K43-_zhQZiM&t=108s if you dont know how to do that.
Blended the line drawing over the oil painting using darken.
Flood fill a new layer with a cream color picked from source. Add sandstone texture and a mask to that layer. Paint on mask with watercolor brushes to show the dogs underneath. Add a few new layers and paint with watercolor splatters in different colors.
Adjust contrasts and add some soft light.