I agree with rottysrule and if you do decide to crate train, go with a wired one. You wouldn't need a large one for a Chihuahua but make sure you cover the top and sides with a blanket or a dark sheet and leave the door uncovered. Also make sure it's placed in a common room where you spend most of your time. We set ours up in a corner in the living room.
You may want to also throw a blanket or a crate bed inside and slowly introduce the crate to your dog.
I covered our dogs crate with a dark sheet and to this day, both of them just walk right into the crate and cuddle each other.
Good luck Marley&me.