04/24/2026
New peer reviewed research shows the most common cause of pet ear infections is Staphylococcus pseudintermedius, and around 40% of these strains are resistant to multiple antibiotics, making infections harder to treat over time. Repeated antibiotic use can add to this problem by driving more resistance. These bacteria are also highly adaptable, forming biofilms that protect them, releasing toxins that damage immune cells, and sticking tightly to tissue so they can persist and evade treatment. On the positive side, a recent study found that Lactobacillus casei can help target this pathogen directly. It was shown to inhibit the growth of S. pseudintermedius in all tested strains and produced clear antibacterial effects in lab testing.
That’s why when Dr. Karen Becker developed her one-of-a-kind canine probiotic, she included Lactobacillus casei in PRIMITIVE PROBIOTICS™ : a science-driven approach to rebuilding and maintaining your dog’s microbiome using strains inspired by wild canids, healthy domestic dogs, and living soil.
If you want to explore a science backed probiotic option for your dog, comment BETTERBELLY and we’ll DM you the link.