I've only done three meads so far, and actually, none of these are finished yet. However,I believe the Wyeast packet has yeast nutrient inside, so you should be ok for your primary. It probably wouldn't hurt to add maybe 1 tsp. when you rack to secondary. Be careful when adding nutrient to an actively fermenting mead., It's likely to foam up quite a bit. I found that out the hard way. I suggest racking half, then adding the nutient, stir a bit, then finish racking.
If you have the means to oxygenate, I say go for it. Otherwise, just aerate as best you can.