The dog's greeting "How do you do?" is a parody of a radio and movie character called "The Mad Russian", played by character actor Bert Gordon.
The WB vendor of choice, Acme, has expanded into the pet shop business here.
Porky's apartment has all the latest furnishings, including the newest kitchen appliances, which adult cinema goers would have appreciated.
There appears to be an abstract painting of a scantily clad figure on the wall behind Porky when he's returned from the neighbors. It likely slid past the censors because it was so vaguely portrayed.
As the canine is addressing the crowd in the opening scenes, the show song Forty Second Street can be heard. That sets the action in New York City.