More concerns. He is super hungry today, eating like crazy. Not sure if it's because he's going through a growth spurt plus the half an hour playing in the snow we got today. How fast do they start showing symptoms and can they hit all at once? I am glad we have a doctor's appointment next week so I can get some answers. We are now experiencing lows right now, but that could be because of the activity. I hate not knowing what to do or if something else is going wrong. Please respond if you have any advice. Thanks in advance.