Hello, I was hoping for some possible advice.

I have a seven year old pure bred Rat Terrier named Ace. He\'s a very good dog, however I first purchased him at six months old so unfortunately I was never able to housebreak him. I got him from the pet store in Willowbrook Mall back before they shut down. I have given it a fair shot at training him over the years, but ultimately it\'s resulted in interior destruction amongst other mishaps. I have arranged to keep him outdoors during the warmer months and in a heated garage during the colder months, although recently he\'s been escaping quite frequently from my property. I have a 15 year old Rat Terrier as well and beginning this year, I will need to begin keeping him in the house due to his age. I fear I can no longer properly keep care of Ace, and although he is a very loyal dog his behavior lately has kept me on edge for fear of his safety. I know rehoming an older dog is somewhat difficult be he is a good overall. If there\'s any advice you can give or assistance in rehoming him please help. I\'d really like him to go to a good home and for my other dog to be able to come in the home permanently as he enters his twilight years. Thank you.