Original sentence: Overcrowded cages and long, stressful journeys via air or truck can cause the spread of disease, resulting in sick animals arriving in the store.Pet shops commonly carry fish for home aquariums, small birds such as parakeets, small mammals such as fancy rats and hamsters, and small reptiles such as lizards and snakes
Edited sentence: In the United States, pet shops commonly carry fish for home aquariums, small birds such as parakeets, small mammals such as fancy rats and hamsters, and small reptiles such as lizards and snakes.Overcrowded cages and long, stressful journeys via airplane or truck can cause the spread of disease, resulting in ill animals arriving in the store.Pet Supplies "PLUS".Some stores still house animals in pine or even cedar beddings, which have been widely agreed upon as dangerous to the respiratory systems of pets and humans alike