fever

Question
how can you tell if a kitten/cat have a fever?

Answer
Sometimes their ears are warm, but really, the only way you can tell for sure is by using a thermometer.  You can use a glass rectal thermometer or any digital thermometer to take their temperature rectally.  They sure don't like it, but it's necessary if you think your cat may be running a temperature.  Use a small blob of lubricating jelly on the tip of the thermometer to make it a little more comfortable.  The thermometer should be inserted about one inch into the rectum.  The normal temperature for a cat is 100.5 - 102.5 degrees F.