This was actually the first day we brought him home... I was cleaning the barn letting Wren lead George around in the front of the barn. Heard barking and went out to check and found that Wren had climbed on from the fence and was walking him up and down the fence line to the backyard, driving Rosie the mastiff crazy....
Snapped a pic then had her bring him in, and gave her a lecture about
1) Riding without permission and supervision
2) Riding without a helmet
3) Riding next to the dogs
... good to know he will tolerate her foolishness.