Other than Bud having the same facial expression as a great white taking a seal......

I am not expert on the 7d focusing capabilities - I would think that is the driving issue???? Which of the lenses mentioned focuses fastest?

I have to say I am bit confused on the 70-200 2.8 not being sharp enough, yet you entertain the 70-300 - At 2.8 the DoF is razor then for these fast moving targets