Definitely issues I have been thinking of (mostly due to recent weather). Rodents I am not too terribly worried about as they can't "get to" it...unless they chew through wood of course. I have a 5gallon feeder inside too. I may just fill that up and keep that going to be honest. If I can't find a good way of sealing it up, I may just use it for snacks, which is just fine.
I like to co in coop everyday just to keep an eye on things.Really, I was looking for something convenient that I wouldn't have to go into coop. But a 5 gallon bucket would keep them fed for a while, so really, should suffice.