Safflower Seed Birds Have Stopped Eating At My Feeders Since The Last Time We Filled The Feeders, Could Seed Be Bad?

Birds have stopped eating at my feeders since the last time we filled the feeders, could seed be bad? - safflower seed

We have bird feeders in our front yard and they were filled to about 3 weeks when we met (safflower), but very few institutions. They also have frozen our lost bird feeder to keep the whole winter.