Hi again! So...he did squeeze in some of the '20%' acid-forming foods into his menu...the cereal at breakfast and the meat at dinner. And....ooooooh yes it can get cold in the winter time - who knows? - maybe ten minutes out in the freezing cold invigorating air is equal to two hours on a moderate day! ha. Probably not. Just get out when you can and enjoy the outside air - but, no!, don't freeze!