Sound suggestion IMHO. The compositional ‘rule’ of thirds and subjects having space to look into an image. I know rules are made to be broken but sometimes they can be effective guides!
Compositionally, for the way the eye works, I understand cropping. But subject-wise, wondering if the bareness of bush doesn't add to the sense of separation from the world below, juxtaposing that bareness with the living human and dog.... I keep staring at this beautiful picture, and can't make up my mind whether better to crop.