Since rat poisen has been detected in dog food from China, is our food supply in jeopardy?

it wasnt the food but the chemicals in the wheat that chemical is not banned in china. What i dont understand is why we buy wheat from china the US is full of wheat, corn, rice etc. goes to show you that the US gvnmt won't even support our own farmers. we cut their prices down buy buying wheat from china. Boy Canada is looking better every day that Bush is in power.