Very normal for a feral. I have a feral girl and she will not walk into any type of shelter or box. They are smart, they do not want to be trapped. I have been caring for my feral for 3 1/2 years now, and last winter was the first winter I convinced her to hang out and sleep in the garage at night, but it took a LONG time to get her to the point where she would even walk into the garage. Now, as it is getting a little cooler at night (I live in FL, it's still pretty hot), my husband works in the garage more in the evenings and she's already starting to hang out in there, she is just waiting for it to get cold. In the beginning though, I tried everything to make a warm place for her outside, and I would be frustrated too that she just would not go in. I made one of those nice, insulated feral houses with straw.....she never set foot in it once. In fact, she won't even lay behind a plant or anything that obstructs her view. It just just instinct for them to do that, that's how they have survived this long. What I did end up doing was order one of those heated mats for her to lay on. I think it's a K & H brand. It only warms up if they are laying on it, and it warms up to their body temperature, I believe, so it doesn't get as hot as a heating pad. Arwen LOVES her mat! She is so funny that if I put a cat bed outside on the porch, if it has sides to it....she won't lay in it, but she will lay on the flat mat. But inside the garage in the winter, when she sleeps in there, she will sleep in the little cat bed with sides. I guess she knows she can sleep with both eyes closed maybe when she is safely inside the garage. They do make a heated feral house that has a front and back door, and I have heard people say that their feral cats will go inside those, because it has a way out. The first two winters though, the best I could get Arwen to do is sleep on top of a bunch of blankets that I would put on the front porch for her, and she would sleep on those. It broke my heart that she wouldn't go inside the shelter I made her. Lucky for me, I live in FL, and it does drop into the low 30's in the winter, but it's usually back up to 50 the next morning. I would get that heated mat if I were you. I know my Petco carries them, or you can order them online, but I have never seen them at Petsmart or Pet Supermarket. I paid $39 for mine, worth the money. The cover comes off, so you can wash it. I would still leave your door propped open to the porch and he may surprise you and come into the porch once it gets colder. Poor little guy. It takes time to gain their trust. It took me months before I could even touch Arwen, and she used to hiss at me and belly crawl up to her food bowl, inhale the food in 4 bites, and then run off. She still won't let anyone hold her, but we can pet her and love all over her and she loves to be near us.