For complete immune defense, try Fera Pets Immune Goat Milk for Dogs & Cats. This immune-supporting topper combines colostrum, organic turkey tail mushroom, and probiotics to help your pet stay healthy. Colostrum provides a natural source of immunoglobulins to help regulate the immune system. Antioxidant-packed turkey tail Mushroom promotes healthy immune function and resilience, while Bacillus subtilis thrives in the digestive tract to support gut balance and help defend against harmful bacteria. Plus, all this goodness comes in a whole-cream goat milk that’s delicious and easy to digest.