For longer procedures, an IV fluid warmer can also help maintain body temperature. (greenforestvet.com)
Can the baby maintain body temperature in an open crib for at least 24 - 48 hours, depending on how premature the baby was at birth? (kidshealth.org)
The smaller the dog, the more difficulty maintaining body temperature, which is why a coat or sweater is a good idea for pups under around 20 lbs. (stevedalepetworld.com)