Pet Attack MacroFollow

I'm trying to make a macro that will cast hunter's mark and misdirection while sending my pet to attack. Kind of an all in one pet attack macro. I'm currently using:

/cast [target=focus,help][help][target=pet,exists,nodead] Misdirection
/cast hunter's mark
/cast serenity dust (pets special ability)
/petattack

This sends my pet and uses my pets special ability and casts misdirection but it doesn't cast hunter's mark. Any ideas how I can get hunter's mark in there? Or is it even possible?

Thank you!