oh man ....i can feel u....i too am a pet owner and i know how attached people can become.....but as i can deduce that you said he was 4 days old....did you get him or you had his mother with it aswell?? if u got it alone then thats wrong....every animal has its age to be kept as pets without their parents....for dogs the suitable is atleast 4 weeks and in this winter even that is less......