As most Yorkies have gastro problems, including my four, I always recommend to Yorkie owners to use a probiotic. I use this with each meal. It establishes good bacteria in the gut, dosing with each meal maintains the good bacteria, and aids in digestion and the absorbtion of nutrients from the food they eat. It also prevents bad bacteria from taking over, which is a common cause of stomach problems. It also can help with their appetite. Wylie's Mom first told me about this product, she uses it too. Mine were on antibiotics every 2-3 months it seemed like. They haven't had to go on them since I started using this.
Nature's Farmacy - Store - Product Details