We're looking for a used, reasonably priced doggy cart for our 11-year old female Corgie. She's losing the use of her right hind leg. Cortisone injections, chiro treatments, medications, etc. are not helping. Would like to hear from anyone who has used these carts - the success stories, the failures, how long were they used before they were no longer useful. We want to give our girl the best care we can. It hurts to even see her have to get the injections, because we know they are painful, and are only lasting 2 weeks.