I run Pawsitive Restorations Animal Rescue. Our small organization takes on a LOT of medical cases. Over the past year, we have taken several hundred animals from puppy mills. They typically arrive with advanced upper respiratory infections, and in many cases, that URI has progressed to pnuemonia by the time they arrive. At an average of $2,500 per night for hospitalization and o2 support, we simply couldn't afford to continue saving the lives that need us most. We made the investment to purchase THREE Buster ICU cages (1 small, and 2 large). We have a 5L o2 concentrator for the small ICU cage, and 2, 10L o2 concentrators to run the large ICU cages. I can't count how many URI and CHF dogs have been saved because we had the ability to give them much needed o2 therapy in house. The initial investment was expensive for a small rescue like ours, but the benefits to the dogs, and the money saved in the long run have been incredible. We'd love to purchase another, but that's just not in the budget right now. For now, we are happy with the lives saved and the ability to have this helpful tool at our disposal.