Corn smells like vinegar

I bought deer corn last week and filled feeders yesterday. The corn has an unholy vinegar smell. On the label it has proprionic acid as a preservative. I think they got too much in this batch. Has anyone come across this before? Will the deer still eat it? I assume the pigs will, but will they come to it as readily?

Sounds like the corn got wet and is starting to ferment.

Not sure about deer if it fermented like it sounds. However, the hogs will eat it up.

I don't believe it got wet. It's all dry. No mold, and the corn isn't sticky. I've had fermented corn, and that's not what I have. This is more of a chemical vinegar smell. One of the ingredients on the label is proprionic acid. I looked it up and it has a vinegar smell. I'm pretty sure that's what it is. Question is, will it be bad for the deer?

High moisture corn less kernels to the 50 pound sack

proprionic acid