.... I don't get the ACV thing. I see where a lot of folks add Apple Cider Vinegar to their chickens' water, at least on occasion, for various health reasons. Here's why I'm puzzled. My kids and I have done experiments where we put eggs in tumblers containing water and ACV in various solutions, or just straight ACV, or lemon juice/water solutions, and the ACV always dissolved the shells. (The lemon juice did not, at least not to the same extent.) The stronger the solution (i.e., the less water), the more quickly the shell dissolved. On one occasion we got a shell-less, or rubbery egg from one of our hens. That egg was exactly like the egg we got after soaking it in an ACV solution. I believe it was a 50% solution and we left it overnight. When folks ask why their hen laid a shell-less egg, the answer is usually that the hen isn't getting enough calcium. Apparently, from our experiments, the vinegar dissolves the calcium. So it doesn't make sense to me to give ACV to my hens if I want them to lay good, sturdy eggs with plenty of calcium and strong shells. Can anybody give me any actual clinical evidence to justify giving chickens ACV? Have any actual studies been done showing that it is beneficial in any way, other than just personal testimonials? I do not mean to come across as a cynic or a skeptic. I am just a sincere seeker after truth, and our experiments have made me curious. Thank you.