14+, I didn't realize it was so easy for a cat to slip the harness! they seemed more secure than that. I'm glad you said something. I will definitely keep kitty close to home, only taking him out and around the property, rather than on the long walks with the dog. I'm sure the property is big enough to keep him happy exploring it without venturing further.
I am continually grateful for all the advice and tips folks pass on to me here. Thanks so much, everyone!