Have you tried checking local farm supply stores for alternative bedding like straw? In my experience, those railroad delays mason_webb talked about are causing shortages everywhere. Even @dakotam46's hamster is dealing with this, so it's hitting small pets too. I switched to shredded leaves mixed with a bit of sand last fall, and it worked okay for my coop. Take this with a grain of salt, but sometimes you can find cheap bulk pine shavings if you ask around at sawmills. It's not perfect, but it gets the job done when prices spike.