Hi Ilove my Chi,
Dogs do not get colds , can you tell me what you are seeing?
How old is your dog?
Thank you for that information. A hot dry nose does not indicate fever. YOu should take the temperature rectally for accuracy. Normal for dogs is 100.5 to 102.5. A fever may indicate an infection
Check the dogs gums, if they are white , pale , blue or gray this is an emergency and you need to seek vet care tonight.
Sometimes dogs get viruses that resolve on their own in a day. IF the dog is eating and drinking, has no diarrhea or vomiting, then it may be an infection. Small breeds are prone to bladder stones and urinary tract infections so if there is an increase in water intake or out put then you may be looking at either one of these.
Take the temperature and keep her warm tonight. If there is still a concern bring her to the vet in the morning. Here is a site that tells you what is normal for dogs, pulse, heart rate, gums color etc. If there is anything on this list that is troublesome then seek vet care.