You can try that, not letting him get farther than the line allows, or drop it...at least you can usually find it and step on it.
The short fence that he can jump, but which is farther down on the other side is, indeed, a problem.
Well, I didn't read through as I normally would before answering. You are already connecting leashes. Excellent.
No, the lack of exercise doesn't help, you're right. Maybe you guys need moonlight walks! :-)
Good thinking on the food.
Eegads on the wall. Definitely a long leash.
Good luck, and please keep us posted!
Love All Life, Thank You For Posting! :)