why dont you put the barrell on its side and leave the lid off with some bedding in it,it would be condensation free then,atb wf
when i kept terriers all of them were in barrels on wood shavings never had a problem with condensation and in winter i used heat lamps so the hight of the barrel was just right , i had a border bitch a bit on the shy side and she would hide right at the back of the barrel where i couldnt reach her so thats why i stand them on end. atb sp. P.S i dont keep terriers no more but i wont get rid of them they are stored in the garage you never know i might get another o