[frontierrots]

Did the vet just scan the back or all over?

When scanning for a chip that you don't know the exact position of the chip companies tell you to scan the entire dog in overlapping patterns.

The diagram for shelters shows scanning the face, head and throat (some vets used by USDA puppy millers chip in the gums. yuck I know) Then scan the back of the neck, throat, chest, armpits. Then shoulders, upper arms, front legs to the feet. Followed by scanning the back, sides, belly, haunches and rear legs

IF the chip is in the dog it will scan unless it has been damaged by being hit by car, etc..

I scanned a stray once with a chip on his rib cage

Most of the new ones now a days don't move if installed properly. Properly being the key word