I would not inject anything into the vent since that can push fecal bacteria up inside the oviduct. But just using the polysporin or honey on the outside will keep it moist and from drying out. Since there is damage and blood, I would not try pushing anything back in, but wait until swelling has decreased when it should go back in. Pink tissue is a good sign of living tissue. Dead or necrotic tissue will eventually slough off normally.