Lactoquil Chewable Tablets are a specially formulated probiotic supplement to help dogs maintain proper digestive health. Although stomach upset may occur throughout your dog’s life, there are specific times where stress may instigate additional digestive issues. During these periods, Lactoquil™ can assist healthy GI function to help you and your pet cope. Stressors that may benefit from Lactoquil. This product contains probiotics, a source of concentrated and viable beneficial microflora that have been both laboratory and university researched.