The number of types of pet supplies is not as unlimited as the types of pets you can have. You need to research what you need and why. Then talk to the pet shop members.
One thing to keep in mind is that many pet stores that completely pets friendly will also give you a discount on your supplies if your pet is a lifesaver.
There are many companies that provide pet supplies online. Poop bags are also one of the important pet supplies to buy. You can easily buy dog waste bags in bulk & dog pooper scooper with bag attached from various online sources.
Some shops have been known to offer certain items for free or up to eighty percent of all their costs. Many people are tempted to go crazy with new pets, just as with new babies. You're buying too many toys that animals oftentimes will never play with.
Surprisingly, dogs and cats love very cheap items. You can buy a great pet bed and the pet will probably never use it instead of choosing a cardboard box or just in the corner of your home.
This can be frustrating, so take a walk first. Buy only what you need to keep your pet comfortable and safe. You will also need to purchase items that can help train your pet. You need a good bin or cage and you will definitely need a baby gate to keep animals out of the room you don't want.