Electric Poultry Net Protect against Coyote, Wolf and Bear?

I live in Northern Minnesota with a large amount of Coyote, wolf and bear- not to mention raccoons, etc....

I am making a mobile Turkey Roost, similar to the Polyface design, but want to better prepare for predator pressure....

Polyface only has electric netting as protection- the roost is wide open....

Any insights/experience as to if the electric net is actually going to keep these predators at bay? Obviously a coyote could easily jump over it if it wanted to....

Anecdotal stories welcome!

(Attached is a photo of one of the official Polyface units, photo supplied by Polyface).

Looks like a lot of dead turkeys to me.  Seriously, I would not trust electro-net to stop night-time predators.

I agree with Tyler, an open structure like that is a dinner bell clanging away to northern predators. Myself, I would go with a enclosed coop structure to put the birds away at night. The coop is your first defense against predators, the electronet is a secondary line and you are the final defense.