Canadian Brand. Milk Thistle is a simple, single-ingredient botanical made from 100% ground seeds of Silybum marianum. Naturally containing flavonoids such as silymarin, it is commonly added to dogs' diets during periods of dietary change, seasonal shifts, or environmental exposure. Often chosen to help support normal liver function as part of a balanced diet, milk thistle has a long history of traditional use. Milk Thistle may offer liver-supporting, antioxidant, and anti-inflammatory properties. No fillers, flavours, or preservatives - just pure botanical nutrition for everyday wellness.