I am so glad Jack is back where he belongs, so what are your neighbors up to these days. I would try to stay clear of their yard, or whatever they try to pen on your Jack and you. I think you should look into invisible fencing to keep Jack inside your yard. I love my fencing and Sahara does really well with it. I know you guys are military and it would be a huge investment but I couldn't stand living next door to those people and worrying about Jack going near their yard.
I love the pics of Jack and Aiden, he is adorable. Enjoy him while he is small, it seems like just yesterday that my own son was that size, they really do grow up so fast, he is 25 now. Jack is so cute looking over Aiden, they seem to get along great, I am so glad you didn't sell Jack.