Is anyone else out there running into an issue with grain mites?! Had a huge problem with them over the summer buying Purina and Nutrena from TSC. Got the situation under control but had not gone back to TSC for grain. It’s been over a month and today went to Runnings which just recently opened up here in my area. Brand new bag of Purina flock raiser was bought and when opened it was 40% powder with mites present! Does anyone else feel that this may be an issue with Purina/Nutrena? Any suggestions on another brand of good feed to use for all flock purposes????