This is not possible at all,changing your favourite team to another team,it's like falling in love with two different Women,but this one is quite different,I wonder how many can be so faithful to a particular club without switching to another when their team lose.So many times I have tried changing my team to another club who is doing well,but I find out that it so impossible to do that.I am a Liverpool fan,and I will remain a Red till death do us path.This is a club I loved from childhood,and till date,I'm still in love with my club.
Football is something that has to do with feelings, so in my opinion, it is possible. I have supported Manchester City since I was a young child. Players like Mario Balotelli, Sergio Aguero, and Tevez really makes me developed strong feelings for the team that year. So in 2012, I don't know how it happened, I see that I've started to have feelings for Chelsea because of Ballack and Frank Lampard's playing styles. That was the reason for changing from Manchester City to Chelsea.
my friends that I watched ball together with at the time, they told me that I wasn't a good football fan because a good football fan had to be patient and only support one team. But I didn't mind them because I knew that I supported the team that made me feel comfortable because everything in this life is based on your level of comfort.
Lionel Messi is another perfect example to me, it still seems like a dream that he left Barcelona. so if Messi will be in Barcelona right from his childhood and still leave, in my opinion it is possible one should change from his favorite team to another, what matters is comfort.