With a rat hole cover that is properly vented.
The rat hole
The rat hole
No, it is not safe to put rat poison down a rat hole as it can pose a risk to other animals and the environment. It is recommended to use alternative methods for rat control.
It digs a hole in the ground (like an ants home).
hole
in a hole
Windex :D
You've, no doubt, heard of the analogy "like water down a rat hole" to describe a waste of time, energy and resources. A fox's lair is much larger than a rat hole. Good luck with that.
You die
To effectively kill rats in a rat hole, you can use rat poison or traps specifically designed for rats. Make sure to follow the instructions carefully to ensure safety and effectiveness.
The only thing you can do is take it to the vet. It sounds like your rat has an Upper Respitory Infection. It will not heal by itself, it is not like a human cold. If left untreated, your rat will eventually die from this.