I want a electric fence to fence in my dogs and also protect my chickens. I plan on running the electric fence on the outside of the chicken run. I want it strong for the dogs as a underground with batt. collar did not work with her, I also had a bark collar that did not work for her so I know she is hmmm shock resisitant? Anyway wat joules rating should the fence have? I don't want pre-fried chicken either. Thanks, I hope someone can help as I need to get this ordered. Thank you again!