A product literally named 'Core Elements Probiotic' (per the original research brief) could not be located on the current site — closest current match for a probiotic powder is 'Vet Strength Native Canine Probiotic Powder'; flagged as a probable rename/discontinuation in products-gaps.md rather than assumed identical.
Two: Probiotic Bites, a chew, and Vet Strength Native Canine Probiotic Powder, a packet.
It varies widely: Probiotic Bites deliver 6 billion CFU per chew, while the Vet Strength powder is listed at 6 million CFU per packet.
It's shelf-stable.
No Amazon ASIN is listed for either product in the data gathered.