/assist Katriane
/stopmacro [noharm]
/petattack

(Replace Katriane with your main's name, of course)

This is the macro I use, so the /assist & /petattack on one button. Works really well. I had just the top and bottom ones before, but I had targeting issues with my lock pets. I would target, assist, and somehow the 2nd pet would sometimes attack the wrong target, sometimes causing a LOT of trouble!

Enjoy your two locks, I am loving it!