The only good squirrel is an absent one.
I don't make any effort to avoid the squirrels that happen before my bike. I've learned too many times that that it doesn't matter what direction you happen to swerve to avoid them because they are unpredictable. Sometimes they dart back from where they came from, sometimes they continue on their way, sometimes they run will you and then dart, and sometimes they just sit.
I just keep on my line and if I hit another one, oh well. Too bad. More grub for the marsh hawks.