I think that I merely hear the 'sticky' chain assembly grease on a brand new sprocket.
DID, RK, EK or Renthal / 520-106L either O-ring or X-ring. I find the O-rings tougher in dirty environments.
I'm glad that a dog or kid didn't run-out in front of you. You must have tougher feet than me. (that wouldn't take much.)