No kill shelters for a cute older stray dog

Hi guys, a cute older stray dog recently showed up to my home, we have brought him inside and have been feeding him regularly to fatten him up because he looked thin but now he’s getting there slowly. I can’t keep him anymore unfortunately my landlord has asked me to please find a place for him since we already have 3 other dogs 🙁 He’s super potty trained and really the sweetest guy. He’s maybe 4 years old or more not sure. Any ideas where I can take him that is a no kill shelter?? I know there’s no real such thing as no kill maybe but I just want him to have a chance at life, deserves it 🙁 pics of him