We considered more expensive options of adding more fencing and uglier options of adding black chicken wire, but found this easy solution on Amazon.
Even though Pickles is so much bigger than our Pepper, it was always Pickles getting out. Pepper has a wider face LOL, so she couldn't get out.
Easy and Inexpensive way to keep Pickles In
Dog Neck Pillow
Wow, she thinks she is getting so pampered and spoiled! It is really just the best way that we have found to keep her from slipping through the fence and exploring the neighborhood. #1 Best Seller on Amazon and easy to put it on when we let her out back and slip off when she comes back in - gotta love Velcro.