It does seem logical that a person wouldn't want to take a chance at petting a dog they don't know, period. I can understand how you're seeing it angelbow. I would just feel like saying, "Hey, you shouldn't have come near the dog."

However, laws are laws. The dog owner is liable. What is so hard to understand is why is her vet having trouble finding any info on her dog/s? Also, why is he accusing her of having extra pets in the house? Okay, the guy is upset but why is he fabricating stories?