Did you know that what a dog receives early in life may have an impact on their skin and immune system years later?
A scientific study investigated the effects of a probiotic (Lactobacillus rhamnosus GG) in dogs with a predisposition to atopic dermatitis, a common allergic skin disease.
How did the study work?
In the study, pregnant Beagles and their young dogs received a probiotic during the first six months of life. Another group did not receive probiotics.
All dogs were then exposed to common allergens such as house dust mites, grass pollen and ragweed to evaluate how their bodies reacted.
Three years after stopping the probiotics, researchers reassessed how the dogs responded to allergen exposure.
What did they find?
Dogs that had received probiotics early in life:
• developed less severe skin symptoms after allergen exposure
• had similar allergen-specific IgE levels compared to the other dogs
• showed signs that their immune response was regulated differently
In other words, the dogs were not less sensitive to allergens, but their clinical signs were clearly milder.
What does this mean?
The results suggest that early exposure to beneficial bacteria may influence immune regulation. Even years later, dogs predisposed to allergies may cope better with allergic triggers.
👉 Important to note: probiotics do not prevent allergies, but they may help reduce the severity of the symptoms.
What can we learn from this?
This research was performed in a controlled model. More studies in dogs with naturally occurring atopic dermatitis are needed to confirm how relevant these findings are in everyday veterinary practice.
Still, it highlights an interesting concept:
supporting the immune system early in life may help influence skin health later on.
References
1.Olivry, T.; Mas-Fontao, A.; Aumayr, M.; Ivanovova, N.P.; Mitterer, G.; and Harwanegg, C. Validation of a Multiplex Molecular Macroarray for the Determination of Allergen-Specific IgE Sensitizations in Dogs. Vet. Sci. 2024, 11, 482. https://doi.org/10.3390/vetsci11100482
2.Welters, M.; Mas-Fontao, A.; Auxilia, S.; and Olivry, T. Composition heterogeneity and low-molecular-weight allergen content of Dermatophagoides farinae house dust mite allergen extracts used in veterinary medicine. Vet. Sci. 2025, 12: 824. https://doi.org/10.3390/vetsci11100482
