Pet food brand whose name reflects its founding in Allentown, Pa.

ALPO

This brand’s name was inspired by its original product, "Allentown Liver Pudding for Dogs," before shortening to its current form. Look for a four-letter name starting with the city’s first initial.

The clue points to ALPO, a well-known pet food brand. The name comes from its origins in Allentown, Pennsylvania—"AL" from Allentown and "PO" from Pennsylvania. It’s a straightforward reference to the company’s founding location, making the answer a play on the city and state abbreviations.