That's a good one, WJS. I want to answer fully but please keep in mind that I can only give you my opinion, and nothing I say is the "official position" of anyone who sponsors or controls this website or anyone in Joe Cross' organization. In other words, I am just an opinionated citizen and nothing more. Joe doesn't speak for me, and I don't speak for him.
Now that that is out of the way, let me answer your question.
First of all, congratulations on your 44-day juice fast. I remember how I felt on top of the world when I finished mine, and I've felt good ever since. When you are coming off of a reboot, the key is to do it SLOWLY and don't integrate solid food all at once. Take the first week really easily by ingesting juice and maybe a salad or two every day. For the second week, add a good breakfast such as steel-cut oatmeal and some fruit for lunch. You should take a month at least to get back to eating normally, and by "normally" I mean three meals a day (if that is your wish) but be sure to eat healthy food, OK? No more junk food, no more pizza, no more beer. You can have dairy as long as you can digest lactose. I had to do a lot of research on dairy when I was diagnosed as lactose-intolerant and I have a lot to share with everybody.
The dairy section of your supermarket is loaded with food items that are produced by the commercial dairy industry under close supervision by the state and federal government (the FDA, for example). Milk and milk products that have been produced from cows that have been raised under natural, organic conditions is one of the wonders of the nutritional world. Unfortunately, the commercially-available cow's milk and the products derived from the milk are produced from animals that live in horribly crowded and disease-ridden conditions, have been fed a diet of genetically-modified corn (rather than the green grass that is their natural diet) and the animals have been given a very serious amount of antibiotics and growth hormone all of their lives (so that their milk production will increase and the dairy industry can be more profitable). The government that NEVER lies to us (I'm being sarcastic, of course) and a dairy industry that is desperately trying to maximize profits both claim that there are no adverse effects of drinking milk from cows that have been fed GMO (genetically modified organism) corn and treated with these drugs. As you can probably tell, I do not agree with their assessment one bit.
Not convinced? Consider the following: milk producers treat their dairy cattle with recombinant bovine growth hormone (rBGH or rBST, as it is also known) to boost milk production, but rBGH increases udder infections which results in pus in the milk (pus that you drink when you drink the milk). rBGH also leads to higher levels of a hormone called insulin-like growth factor in milk. In people, high levels of IGF-1 may contribute to breast, prostate, and colon cancers. Does anyone really think that eating healthy should include products that may GIVE you cancer?
Also, milk and milk products have to be pasteurized in order to be sold in a commercial supermarket. At one time, this was a good thing because there can be very serious diseases caused by ingesting milk that has been contaminated (listeria, for example). Unfortunately, pasteurization (heating the milk to kill the bacteria) can also destroy the important enzymes and other proteins that make milk so good for you, so what's a person to do?
Answer: DRINK RAW MILK
Raw milk is cow's milk that is taken from clean, well-maintained family farms and from cows that have grown up without GMO corn, hormones, or antibiotics. The animals are nurtured and treated humanely, and they grow up eating fresh green grass. The milk is fresh, easy to digest, delicious, and loaded with enzymes that would normally be destroyed during the pasteurization process.
There is a growing movement in this country of people who are taking their lives back, and regaining their health naturally. Whether their chosen path is Paleo, Raw Foods, the Weston Price foundation, Veganism, or something else there is positive energy out there being produced by ordinary people taking charge of their health and their lives. Juicing is one of the crown jewels of the movement, and the push for allowing raw milk to be sold commercially is another. In most states, raw milk is banned outright. In other states, raw milk is sold under VERY stringent conditions and it is very difficult to find. If you can find it, it is worth it. In Virginia, for example, you have to actually buy "shares" of a cow and then the milk is free. If you have ever drank milk from a Jersey cow that grew up eating green grass from the Cumberland Valley, you'll know why I love the flavor so much. Remember when I said that I was lactose intolerant? I can drink raw milk by the gallon with no side effects at all.
Not only milk, but milk products such as cheese, butter, kefir, and yogurt are affected by this debate. You spoke of eating Greek yogurt, which is marvelous, but yogurt made from raw milk is much, much better for you and your digestive system than commercially available products. Family farms that sell raw milk are usually very closely regulated for cleanliness and for the health of the animals, and the animals are fed a diet of green grass, which is their natural diet anyway. I have not heard of any cases of contaminated milk being sold by raw-milk farmers.
Please do your own research and follow your own instincts, whatever they may be. It is your life and your choices to make. I love my new, healthy life and I want to spread the word to everyone about the wonders of natural health. Juicing, organic gardening, raw milk, life without medications and antibiotics, raw-foods, no drugs or alcohol, exercise, etc...are all part of my life now and I couldn't be happier.