I have been boxing for a while, I dont post much, but I was wondering which pets can handle PVE trash vs bosses, Or should I not bother trying this?

I mean can the hunter pets handle bosses better than warlock pets? and Can the hunter pets handle trash better than warlock pets?
Keep in mind there will be a dedicated healer on them, probly a shaman with chain heal. I just dont want a tank in my group, I dont know why

Has anyone tried 4 locks and a healer in instances?

Thank You