I actually recommend that all my clients get off milk. We are the only species that drinks the milk of another species and in spite of all the wonderful marketing with hollywood stars promoting milk, we don't actually absorb the calcium very well. Once clients get off milk they feel much better with much less or no congestion. I would skip the milk entirely. If you want to see how you would react, eliminate all milk products from your diet for 2 weeks and then have a glass and see in the next few days following if you are more congested or have other issues. I don't see any benefit to giving birds milk.