How do you think HollyleafJayfeatherand Lionblaze find out who their parents are?

I think that they will find out a hard way or from Leafpool

SPOILER

Jayfeather does some investigating and with the help from Mousefur and longtail he is able to find some clues. he also has a great memory of what he had smelled after he was born, and he remembers that he had smelled a nother cat besides Squirrelflight. When he pieces the clues together he figures out that its Leafpool. She will then tell him that his father is Crowfeather.