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I'm wondering what is the difference between Lactobacillus acidophilus and Dried Lactobacillus acidophilus Fermentation Product. I know the Lactobacillus acidophilus is from dairy, so is the casein or whey protein somehow eliminated with the fermentation of it? My cat's blood test showed her strongly allergic to dairy, and she has improved immensely by giving her foods with no dairy.

There is no difference other than the changing whims of what regulations require in terms of terminology. Probiotics such as Lactobacillus acidophilis are abundant in dairy products, but that is not the only source. They are also abundant in nature, including the digestive tracts of humans and animals. Wysong probiotics are grown on substrates specifically for food use, not from dairy.