I'm still not quite sure whether reindeer are real or not.
What is your reason for thinking that reindeer may be real?
Well if Santa isn't real then reindeers aren't real
There is a wealth of information proving reindeers are real. Just because one fictional character isn't real doesn't mean others aren't real too.
How do you know they aren't real?
You are free to have your own opinions and perceptions about what is real and what is not. Some people believe in santa and reindeers, and others do not. Feel free to formulate your own opinions.