I feel the same on the matter of the sky. You could edit one in as long as it looked natural.
This technique is sometimes overdone and with a totally unrealistic sky addition.
I too like the pose of the subject. Looking very commanding and rather majestic so good on you for the timing of the shot. A bit too much foreground for me. We can see it is a hill from the angle so I think you could safely lose a third of the grass. Maybe a square crop would work.
You can't always choose your skies and I have so many shots that I dump because of a flat, grey and boring background. You took the opportunity to capture a magnificent looking animal and that much of the shot is really good.
This is only my personal view, not meant as any offence. I hope you find it helpful.