/petattack [nomod]
/cast hunter’s mark

I’m not sure, haven’t tested it, it just came to my mind this moment. But this should work so that when you press your button it will cast hunter’s mark and send your pet to attak. But when using alt/shift/ctrl together with this button it should only cast hunter’s mark.

If you want it the other way you could use

/petattack [mod=alt]
/cast hunter’s mark

so only pressing alt with your button sends the pet to attack.

I do not use a petattack, hunter’s mark makro. Most of the times I have my pet on defensive, even in dungeons. There are some dungeons or some situation I put it on passive, but most of the time defensiv is good for me. I use /cat hunter’s mark on a button, but only to quickly mark a target i am attacking. As a panic button I have

/petpassive
/cast mend pet

from there i can still send my pet to attack using CTRL+1 or set it back to defensive. (clicking with the mouse)

Is a good one – been using it for yonks. But would like to add a line where i could prevent the pet from attacking sometimes – ie marking up a boss before the pull.

Also – on an Alt im tanking low level dungeons using the LFG tool, and i WISH that hunters wouldnt start thier rotation with multishot. It makes add management a nightmare sometimes.

That and FD. FD + Omen is god. DON’T wait untill you pull aggro to use FD. Use it as soon as you APPROACH the tank in threat. That way if it fails – and it does quite often – you dont have an elite chewing your face off and an annoyed tank.
Belive it or not, but threat management is a 2 way street.

@ Donovitch – What class? You may check out my blogroll, I suppose.