I tried to take my house cats for a walk in the garden to see how they would get on with wearing a harness. Unfortunately, it went well until one of them discovered that he could wriggle out of it by walking backward against the lead. Timmy is 11 months and Shani 10, I would really like to be able to take them for short hikes or picnics in the summer, can anyone give advice, I don't know if the harness was too lose or whether it was not a good design, any tips gladly received.