I'm answering in order to bump up this question. It needs to be answered for you considering that you are doing an angel's work. Now this is JMO......since you are unwilling to crate him, it sounds to me that what you are doing by taking him outside a bit at at time will help. There are also belly bands which I use on my boys when we are at my family in MS just to reassure them

. He will come around. I have a mill rescue. She is mentally challenged and has many health issues. I've been blessed to have had her for 10 yrs. considering her start in life. She is not house-trained....I am trained to take her out at intervals. Have you thought about using an ex-pen that is not so confining? Again, I hope that when more people come on-line that someone will provide some ideas for you. Good luck. ~Joanne~
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Joanne

Eli

Chipper

Eva

Snowboy

Rosie(R.I.P. 1996-July 29, 2013)

Cocoa(R.I.P 1998-April 26, 2012):