Product line was renamed within the past few years: 'Probiotic Everyday' is now 'Gut Health for Dogs'; 'Vetri Mega Probiotic' is now 'Extra Strength Gut Health for Dogs & Cats' (manufacturer site states both renames explicitly: 'Vetri Mega Probiotic™ is now Extra Strength Gut Health!'). No Amazon ASIN could be located for either current product this research pass (search-engine lookups were blocked/budget-exhausted, and neither product page links to Amazon).
Two: Gut Health for Dogs, a shelf-stable chew, and Extra Strength Gut Health for Dogs & Cats, a capsule.
It runs from 1 billion CFU per chew in Gut Health up to 7.5 billion CFU per capsule in Extra Strength.
Yes, Extra Strength Gut Health for Dogs & Cats is labeled for both species, while the standard Gut Health product is dog-specific.
No Amazon ASIN is listed for either product in the data gathered.