Mayfield must be a pretty big city to have at least two pet stores. First we have Mr. Allen in "Pet Fair", then we have Mr. Parker in "The Big Fish Count."

Maybe we can say Mr. Parker bought the store from Mr. Allen.

Let’s not forget Clarkson’s Pets where Ward bought the pigeons. Mortimer’s Quality Pets in the episode when Ward brings home a peacock and Quince’s Cats and Dogs in the one when June brings home an emu for Beaver when she neglects to wear Beaver’s blouse with “oil wells.”

All kidding aside I wonder where Ward got Captain Jack the dog and the hampster in Pet Fair.

There seem to be quite a few drug stores, too.

Let’s not forget Clarkson’s Pets where Ward bought the pigeons.

I thought it was called Claxton's Pet Store...

I think you're right.

Yup and wasn’t certain about Clarkson. Claxton Pets. I think it was Clarkson who fixed Wally’s broken trophy.

And Tildens Sporting Goods
https://i.pinimg.com/736x/55/07/da/5507da9d69b5d20195414c9b9ecfee40--modern-classic-vintage-modern.jpg