Can the Cavalier ever change his teamwork feat and other questions

[emirikol]

Can the Cavalier ever change his teamwork feat or is it the same forever?

Can he advance his mount like a druid advances an animal companion?

Does Improved initiative work for his teamwork feat or is only NOT this feat?

jh

[Mathius]

improved int is not a teamwork feat

a cav mount is druid animal companion from a smaller list so yes

look up the retraining rules from ultimate campaign to change your taction feat