You're taking the basics, with the exception of the calcium, but I think you're taking too much potassium if you're taking 3x550mg and not enough magnesium.
I'm not sure if chicken require calcium, but I suspect they do - don't hold to that, or their RDA though
As for humans - the RDA is between 1000-1500 depending on age and sex. I just double checked and for men, it's 1000mg. Your best bet is to get a cal/mag supplement, eventually (i.e. once you've finished your current magnesium). Look for one that is chelated (malate, citrate - but
not calcium carbonate from oyster shells as it's hard to absorb). You want to take both cal and mag throughout the day, as the body can only absorb so much at once. Most supplements come in a ratio of 2:1 (333mg cal/ 167 mg mag) which is the right mix.
The calf problems could be calcium related - both cal and mag work together to help alleviate these types of problems, although magnesium is the powerhouse. That being said calcium doesnt work w/o magnesium, however calcium plays an integral part in muscle contraction and maintenace of cell membranes.
Magnesium's RDA is 500mg, so you'll want to double that (but again, not all at once). Also, split up the Vit C if you're not already - it too can only be used in limited quantities.
You should notice a difference w/ the increased (and decreased) vits/minerals.
Nat
p.s. It never snows up here either. Honest