Extend Joint Care for Dogs - Extend Joint Care provides natural building blocks for growth, repair and maintenance of cartilage, thanks to a newly-discovered, extra-absorbable form of Glucosamine. It begins working immediately to lubricate joints, help cartilage retain water and prevent future breakdown. Extend Probiotic for Dog's - Support Digestive Health and Gut Flora - Helps aid in healthy digestion, support your dog's digestive tract, and support microflora for upset stomach, gas, diarrhea, constipation, loose stools, bad breath, and more.15 BILLION CFUs per Chew - While leading brands typically range from 120 million to 6 billion CFUs of probiotics per chew, our quality treats each boast of an astronomical 15 billion CFUs.