Have the vaseline smeared on the pipe, the dog cone and also on the sides of the nest box. Used a disposable glove and was done in no time and I am not a mess.
Will keep an eye on it tomorrow to see how Callie acts when she sees or smells the vaseline. They are in the garage overnight so will see her go to visit the area.
So plan A is in place, in hopes plan B or C is not needed.