Except for the inconvenience to the assigned dog, I think they should have let a K-9 unit go in and chew a little bit before using the pepper spray.  Of course, remove the dog first, in the best interests of the dog.   But the police  might have gotten the guy yelling and screaming for a little human intervention if the dog went in first.  People who elude the cops are jerks.  Sometimes it works and they get away.  When we catch the rest we have to inflict a pretty severe level of punishment that starts in the field with the mechanism of the arrest.  This guy got off easy IMHO.