Hi DonnaJean,
One reason for feeling very cold is due to loss of fat under the skin (which functions to keep body warm) after treatment. Our immune system is being affected and we tend to become much weaker than before. It's important that your husband keeps himself warm and strong enough to fight against common illness like a cold. Eat more nutritious food with high calories and when he gains back his weight, his immune system will get stronger too.Doing some physical exercise can also help a great deal.
Karen.