I found some story about cow and Hanuman on Ramkian.
Lakshmana was stabbed with a spear on three times.
At the last time, Ravana use the special spear to stabbed Lakshmana.
The name of this spear is Kabillapat.
For help Lakshmana, Hanuman must to find three medicines.
One of the medicine is Nandi’s dung.

Mor.

This pic is come from Ayutthaya era.