That's my (ever-confusing) boy...
No - you just haven't had him long enough to see the patterns yet.
Lets see... this will be the 2nd? or 3rd? tennis lesson..
For starters...
1) anything new is ALWAYS a challenge for difficult child kids. SO... not usual to have problems for the first few times and then - as if by magic - the problem
might go away (depending on if "shift" was the only issue or not)
2) You are now bring food and water... and trust me, you don't want to try going without it again, but if it ever does happen that you forget or run out... you will know how much this is a factor, too
3) no way of measuring what impact magnesium etc. is having
and so on.
Smile - days like this are better than the alternative!