Mount a simple one bulb light receptacle on a junction box on the wall of a dog house feed the power cord out through the back of the house and thru the fence where the dog cannot get to it. Put the dog house against the fence to keep the dog away from the cord if thats not possible run the power in metal conduit and be sure to ground it, ground the can also, the easiet way to do the can is with one of the mounting bolts .
When the bulb is on, the can will get hot enough the dog wont mess with it.
Take a 3 lb coffee can and with small bolts fasten 4 evenly spaced right angle brackets on the open end poke some small holes in the bottom so it can drain any moisture and you can see if the light bulb is working and then screw the can over the light thru the right angle brackets so the dog cannot get to it.
I use small bolts thru the back of the dog house with wing nuts so its easy to remove the can and change the bulbs.
A light bulb will give of a lot of heat and the can radiates it, like a mini wood stove.
40 watts is plenty down here.
When the bulb is on, the can will get hot enough the dog wont mess with it.
Take a 3 lb coffee can and with small bolts fasten 4 evenly spaced right angle brackets on the open end poke some small holes in the bottom so it can drain any moisture and you can see if the light bulb is working and then screw the can over the light thru the right angle brackets so the dog cannot get to it.
I use small bolts thru the back of the dog house with wing nuts so its easy to remove the can and change the bulbs.
A light bulb will give of a lot of heat and the can radiates it, like a mini wood stove.
40 watts is plenty down here.