OMG! Bugs in the Food!

[Cricket]

I buy my pigeon seed at the local Agway. They only sell 50 pd bags. I only have the two pigeons... so naturally, this should last quite awhile. Please someone tell me how long is seed ok to keep around?? Yesterday I discovered little bugs in the seed! I was getting down to the bottom of the tupperware container... and it did all look kind of dusty. I am now afraid to discover that I have been feeding my boys moldy old seed that sprouted bugs! I feel awful! I picked up fresh food immediatley, but it is another 50 pound bag! How long should I use it before tossing it out? And how do you know when it is going bad???? ugh! And what if any are the damages done to my boyz??? They seem fine... for right now.