My daughter worked in a pet store for two years in speciality.

Here were some of her complaints.
People coming in and wanting to buy animals such as rats, hamsters, piggies and not knowing what to feed them or what cage to buy.
I think anyone buying a small creature should recieve a flyer with basic info on it such as foods to feed and those that are poisen. Just one sheet filled with facts would be wonderful. Also a lot of the bedding is bad for bunnies. The flyer should list the correct bedding for all animals. Just basic stuff but these things help ensure the health and happiness of the pet and the owner.
I would also like to see Papaya tablets for buns in pet stores usually you have to order them on line. And a nice selection of toys and proper snacks for the little creatures as well as books on animal care geared for small children as well as adults.
The best of luck to you.