Our Oxygen Kits for Cats are an ideal solution for pet owners who want to be prepared for emergency situations, during transportation to a care facility or when administering oxygen to their dog at home for a health condition. Our kits contain everything you need to administer oxygen on the spot to your pet, just select their weight range. This product is available for purchase without the need for a prescription from your veterinarian. Depending on your pet's weight range, a single kit will give you anywhere from 90-30 minutes of 99% pure oxygen, you can always add more canisters to your order if anticipate needing more oxygen. *Next Day Air not available for products containing Oxygen Canisters, per O2 shipping regulations, ground shipping only.