I need a temporary winter roof for my run . . . .suggestions?

Well, last year my silly hens would not take one step out of their coop into the run. I suppose cold was part of the problem, but I know it was mostly the snow that bothered them. Now that I have five birds instead of three, I know they will need that extra space in the run. So we "planned" on building a roof on the run, probably with the tinted plastic sheets . . .but it's mid Nov. and it's clearly not getting done this winter. Bummer!

So we will wrap the run in plastic sheeting to keep out the wind, but I need some ideas for a temp roof for our run that won't collapse on them in the heavy Wisconsin snow. I keep thinking a big tarp on an angle, but I'm just not sure!

Any ideas?

The coop is inside the garage, so the part you see is all run. To keep hawks out we put pieces of trellace and bird netting for the summer.

Thanks for any help!!

Why can't I figure out how to post a picture on here???

 

Here's the picture of our run.

I'm just worried about a tarp because the run is about 8 feet by 12 feet. That seems like a big flat area to collect heavy snow?

 

It's adhered to the garage and there are concrete blocks on the front two corners . . so not a ton of support. When we put up the run we weren't really thinking about a roof, just netting. That's why I'm worried about the weight of the snow!