I've used both, as well as "Rooster Booster" and, honestly, none of them worked all that well for preventing/protecting an injury from picking. It seems like anything unusual just draws the hens right to it, even if it's noxious. However, in my judgement, the pine tar was the best of the three, just because it is so thick, but OMG it makes a horrible mess of a chicken (and anything it touches) and is virtually impossible to get out of feathers as noted - but I never tried warming it up as in post above, so maybe that would help. Also have read posts that suggest Vicks (as in vapo rub) but not such a good idea - it can be toxic to chickens, particularly if absorbed through non-intact skin, which is presumably where you would be using it. I thought the Rooster Booster was completely useless.