I feel incompetent. My ND are 6 months old. I had decals done in July and they had barber pole worms. I successfully treated with quest. I just had fecals done and now they have cocci and I've started treating with vets RX. I clean their pen and pasture of berries every day. They also have access to browse and a large green pasture. Free choice hay and manna pro minerals, Purina noble goat feed 1/4 cup per day each. Clean water and food dishes. Vet says our area doesn't require copper or selenium bolse. What else can I do to help them fight the worms?