That looks like it is going to heal up just fine! You shouldn't have an hitches at all.
But I have to say this...as much as a hate barbed wire (we have to have some as well) all fences can hurt horses. I have 6 foot pipefences that my mare attempted to jump. Well of course, as my luck goes, she didn't make it and caught both her back legs. Both legs were literally skinned. I had a mare get caught in barbed wire at a friends place last year and the wounds from the pipe fence are worse.