This idea post-Wiki is: I happened to realize that of course (Hostile) Mobs, Surround oneself when you stay still. However, even being still, one can be pseudo-defended, by certain Pets and /or Golems (which can also be put on Leads, keeping them closer).
But it may be a cheaper (uses a little Iron to obtain, via Shears for Sea Grass, Turtle Breeding, Crafting a Turtle Shell, finally Potion-Brewing) way than Gold (or the fully 8 Blocks of Gold) Apples /Carrot -based other-Ingots' alternative. Already the Turtle Shell, Helmet type doubles Underwater, Breathing time While being as-functional as a (more-Iron using) Iron Helmet; so perhaps these can all be regarded as a: "Slow-but steady, wins the Survival," functional objects.
Afterthought: still; mind the Creepers! "SsSss-ss.."
... I have literally no idea what you are trying to say and I doubt im the only one. Why did you bring up being surrounded by mobs? what are you talking about golems and dogs for? Why did you randomly switch to using materials to make shears and all the sudden bring up turtle shells? what exactly are you wanting?