Hi. A am a 450 hr private pilot with a Cessna 172. I could take one or two small to medium size animals (or maybe just one large one) no problem. Free many weekends, very weather dependant though (VFR only), and I avoid large airports (class B).
email : jfarwell AT trane.com (replace AT with @ and remove the spaces, I tend to be very careful about spam)
This spring we adopted a dog that had been flown from MO to WI for rescue, and she is just a great dog. I look forward to a chance to pay it back a little bit and help another animal.