I recently had sami shaved real short, he looks like a chijuahua

and the weather here has been pretty hot, so I thought short short shave for tilly & sami, but I noticed with the air conditioner on during the day sami shivers.
and at night when were ready for bed I only leave the overhead ceiling fan on all night and poor baby shivers to the point he's shaking really bad that it is worring me, I put on his little sweatshirt on but he still shakes, so now I have to keep the fan off and Im thinking BIG mistake shaving him!! Has anyone have this problem? any Ideas it's too hot not to have the fan on, but im so afraid that he might freeze in his sleep?? I know this sounds a bit odd to think this way, and my husband is P>Off because it is hot at night! so I am wondering maybe it's low blood pressure? he hasn't been eating to good and I took advice from the other posts in regards to nutracal and making him rice and hamburger, and he will eat it, but I didn't want him to get use to the idea of having his meals prepared and discourage him from dry, I even mixed dry food in with the rice and hamburger and managed to leave the dry food in the bowl. So I am totaly confused on what is making him shiver? do you sleep with a fan at night and does your baby shiver? do you think it will be ok to leave the fan on and am I making to much of his shaking?