Mongolia – a little Ritual on departing from a Ger Camp

One morning just before leaving one of the ger (yurt) camps, I witnessed a ritual. A young woman dripped airag onto the furgon's wheels. She mumbled something while doing that.

Let's get into some details. The woman wore a blue dress (deel [1]). Blue is an auspicious color, and so the khadags [2] that are also ritually presented or seen on ovoos [3] or stupas are also blue . She spreads the airag out of a pot with a special wooden instrument, which might otherwise be used to stir the airag.

Is it a Buddhist ritual? I don't want to rule that out, but it's unlikely. However, the popular religion does not always follow the guidelines of the official religion. Is it related to shamanism? A similar answer applies to this. I think it has more to do with guest and host. Perhaps it is part of the farewell, where the ritual cleaning of the hooves or wheels should ensure a safe journey.

Anyway, I would like to know more about this little ritual and like to thank the young lady for being so concerned with my (and my travel companions) safe journey.

Links and annotations:
[1] The deel (дээл) is still widely worn in Mongolia both by men and women.
[2] Khadag (хадаг) is the Mogolian name for the ritual scarf, formerly made of silk, nowadays mostly made of polyester because of better durability. The Tibetan scarf is white to show the pureness of the giver's heart, whereas the Mongolian is blue as the sky. The origins lie both in lamaism as well as tengerism. https://en.wikipedia.org/wiki/Khata
[3] The ovoo (овоо) often, not always, marks a pass. One could call it a cairn. People wrap khadags around them, circle it three times, throw an unequal number of stones on to it, or pot and beads for a safe journey. But this is a topic of its own. https://en.wikipedia.org/wiki/Ovoo

.