Well,now I feel bad! I am sorry your first contact with them sucked.
I looked on their website and there are also phone numbers. This is the numbers for H and H:
By Phone: 512-755-5056
(ask for April)
2nd Contact Phone: 512-755-6180
(ask for Keith)
And this is the number for mobile chicken...
I suspect that I use the same feed as you, but I have been very happy with it. I've used several 50# bags and have not had an issue with bugs. I would definitely contact them and if you don't want to replace the bag, tell them you want a refund. It seems to me that their distribution channels...