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By Dr. Amanda Torres, DVM · Reviewed by the bestcanineprobioticsguide.com Editorial Team · Updated July 2026 The dog supplement market is designed to confuse your wallet. “Only $0.85 per chew!” sounds reasonable until you realize the chew contains 3 billion CFU while a competitor’s $1.20 packet contains 10 billion verified organisms. “Subscribe and save 20%!”…