03/15/2026
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Mast cell tumors are the most common skin cancer in dogs, and your dog’s gut bacteria can influence how aggressive they become. Dogs with higher levels of inflammatory bacteria like Clostridium, Enterobacter, and Escherichia-Shigella tend to develop faster-growing tumors, more metastasis, and shorter survival, according to a new peer-reviewed study on ScienceDirect.
These findings mirror human cancer research and point to the gut microbiome as a potential target for therapy. Probiotics, prebiotics, and even f***l transplants can help by restoring beneficial bacteria, balancing the microbiome, and boosting short-chain fatty acids, which can reduce inflammation and tumor-supporting signals.
Certain probiotic strains can also directly influence mast cell activity. Lactobacillus rhamnosus may reduce mast cell activation and histamine signaling, Lactobacillus plantarum can lower degranulation and support helpful gut metabolites, and some Lactobacillus casei strains can limit inflammatory mediator release. Strain choice matters, making precision-formulated probiotics important.
’s PRIMITIVE PROBIOTICS™ includes these specific strains, sourced from wild canids, healthy domestic dogs, and living soil, offering a science-backed approach to rebuilding and maintaining your dog’s microbiome.
Comment BETTERBELLY to explore this targeted probiotic option for your dog.
