Purina did test the food according to the previous posts...:
I don't know where we've overreacted anywhere. Pulling Mazuri only was ever stated at after Freakie Frog commented on the mysterious deaths in his colony.
He stated he had just recently opened bags of Mazuri 6F as well. I don't think it's far fetched to say he could have gotten the same batch of soy bean meal. Only him having it tested will confirm that it was the food causing deaths.
This isn't the first time Purina has had tainted feed. Look at the recalls on dog and cat food just months ago. I think riding on those curtails, it's not over-reacting to stop using any Mazuri or Purina feed until something firm has been stated by Purina or the FDA.
Caution is not over reacting. It's simply taking preventative measures to keep yourself from any risks.