PetBird Xpress stocks 1,000's of items including Diet Conversion Kit. Quality Customer Care is our first priority - try calling us at 800-448-2014. We do stock Diet Conversion Kit and they usually ship within 1 day. We work very hard to honor our shipping and delivery estimates! Join our group of 12,000 satisfied customers! Whether you are a restaurant owner or a consumer - you can count on PetBird Xpress.