[Mere_de_Jambo]

My baby will need to be neutered soon and I am weighing the pros and cons of micro-chipping and would like to get everyone's take. He is never outside without supervision and is primarily inside. He is never left in the car or anywhere alone except at home for a few hours at a time.
I have heard that microchipping has been found to cause tumors since it is a foreign body inserted into the animal. I want to do what is best for him.....just trying to figure out if it is necessary to do something that can be potentially harmful.