wobbly

We're concerned that the sheep grain (dumor Lamb and Ewe) we have been feeding a few of our lambs and ewes is causing issues. Sometimes *as they are eating the grain* one will get suddenly weak, wobbly, and then find a corner to collapse in. Could this be toxins in the grain? Would that cause...

We received our (what we were told was a 3 month old) runt about 4 days ago. We were given her to us for free when we bought two other pigs from a pig farmer. What the guy said was "you guys want this runt? The mom just didn't have enough milk so she got pushed out and she never grew" so mind...