Existing Fence Conversion System for Shorter Fences Kit - Purrfect Fence
Amazon.com : GRELWT 18 Pack Chain Link Fence Post Extender, 25.2" Fence Extension Height, Galvanized Fence Extension for Dogs(1-3/8") : Patio, Lawn & Garden
Extend Your Fence Chain Link Fence 24" Fence Post Extension - 1 3/8" [1 3/8" OD] Galvanized Steel Chain Link Fence Extend A Fence Bracket | Chain Link Fittings
Unchain Your Dog.org | Extend Height of Fence, Make Fence Taller, Keep Dog from Jumping Fence