OK; if you're eating, put down your fork.
Ready? I think the eggs were there in the rice when you bought it.
When you come home with grains (I do this with flour, but admittedly haven't yet with rice), store them in the freezer until you open them, & then keep them in Tupperware in your pantry. They're probably weevils--betcha they won't hurt you, but you sure don't want to eat that rice now, so toss it. Blech. Don't throw out everything in your pantry--you probably just bought rice that had weevil eggs. Until that lot is gone from the grocer's shelves, I'd switch brands for awhile too. I've had weevils in my starchy food before; you're not alone.
If you're afraid of butter, use cream. ~~ Julia Child
As you cook, you enjoy omniscience about food that no amount of label reading can match. Having retaken control of the meal from the food scientists, you know exactly what is in it. (Unless you start w/cream of mushroom soup, in which case all bets are off.) To reclaim control over one's food, to take it back from industry & science, is no small thing; indeed, in our time, cooking from scratch qualifies as subversive. ~~ Michael Pollan