At the Vet – Boy at the Veterinarian’s Office – who is sitting with his sick dog waiting to be seen by the Veterinarian is an illustration by Norman Rockwell (1894-1978) that appeared on the cover of The Saturday Evening Post on March 29, 1952.

Mr. Rockwell had a special facility with his canine models, who were sometimes his own dogs: Raleigh the German shepherd, Butch the springer spaniel, and Pitter the beagle mix.
Without thinking too much about it in specific terms, I was showing the America I knew and observed to others who might not have noticed.
Norman Rockwell