There is a new pet shop in the neighborhood, the second one in town I think.
I see a lot of fish tanks inside, little else, but all birds in cages out front and little turtles. No mammals.
I admire the attention and care it takes to operate 20+ fish tanks. He must be appreciative of the animals. When it comes to fish, i dunno how much stress they feel. I've had fish that seemed alright, casually streaming about. I seriously don't know.
I know no mammal wants to be cooped up or leashed. Cats and dogs have to trade off their freedom for pet protection and privileges.