Sunnyside Farms Milk is suitable for Sikhs.
Sevadars contacted Sunnyside Farms, here is their response:
I am responding to you inquiry about the source of our Vitamins A & D in our milk. We utilize Vitamin D3, which is extracted from Lanolin and Vitamin A2 is a plant based. The Lanolin is sourced from Sheep's wool, but the sheep are not not killed. Let me know if you need anything further.
Director ~ Quality Assurance & Consumer Affairs
Super Store Industries ~ Lathrop