A marmalade tabby/Norwegian mix showed up at our slider yesterday loaded down with snowballs so big it couldn't walk. We were in the middle of a huge snow storm. I opened the slider to help it and it fearfully ties to run and hide under a wood bench. As I approached it hissed and groweled. I gently tucked a towel around it for warmth and offered it some Tuna and it let me get close as it voraciously ate. After that it would gently meow as I came out and checked on it. I was able to coax it out enough with food to pick it up and it let me but wanted to instantly hide its head in my arm. We have it in a small heated room outside in our garage, with food water and a warm bed. It stays in the very back corner though and won't come forward if I offer it food anymore. It did run and hide facing the corner and hissed briefly after it was in the room but will still let me reach my hand and feed it. Any suggestions about stray or feral? Don't think we can keep it but want to make sure it's in good hands. No one has come forward to claim it. Help!