Every cow must have a Photo ID in West Bengal in India due to issues with smuggling the species.
Cattle smuggling is the movement of cattle for slaughter and processing where cattle slaughter is illegal according to the Law of India because cows are divine animals for Indians in general, where it is legal as well as in neighboring countries such as Bangladesh and Pakistan. Cows had been smuggled in large numbers to Bangladesh and Pakistan although Indian Law.
Because of this, In 2007, Indian border guards began photographing cows in villages in West Bengal, issuing them with identity cards to try and stop the smuggling of cows reportedly.
Smuggling is decreasing since the ID law.