I have a cow that got poked with a temp fence post, the step in kind you get at tractoe supply. It went in her a good couple inches or more and was dangling for a minute or two then fell out. I have no clue how she managed that, stepped on the end of it and it popped up and stuck her is the best I can figure. It wasn't bad rusted buy had some rust. Is this nothing to worry over or should I catch her and treat it? No real wound at all just worried about tetanus mainly?