Is it okay to use the herbsmith clear allergy supplements on a dog that is nursing puppies?

I was just wondering if you guys have ever used the herbsmith clear allergy supplements that you sell with your dogs at your kennel? I am just looking for something to provide some relief to Sierra for her allergies. She has something that has definitely worsened since we moved out here to Arizona, and she is in absolute misery right now. The problem is, she's nursing the puppies and I don't want to give her anything that will harm them, but she needs something! I don't vaccinate her except rabies every 2-3 years as required by state and she eats an all-natural diet.