A bit of tweaking with unsharp mask on the eyes would correct the sharpness easily I think. What do you use to process the photos? I don't know if it's the same for others but on my screens they look like the white balance is biased toward the green/blue end in some of the pictures. That and direct flash was used in a few causing some unflattering reflections and light cast on the animals - One example is #4.
A bit of punchy processing and I think it would make a nice difference!
A bit of punchy processing and I think it would make a nice difference!