The concept of animal tagging is nothing new. In early days, the various cattle farms and ranches used methods like branding irons, to label the name or symbol of the ranch to which an animal belonged.A red hot branding iron, having the proprietary mark of the farmer or rancher, was used on the poor animal to etch out a mark on its hide.
(This is the origin of the term “brand” for an item. Surprising, isn’t it?)

Branding gave way to physical plastic tags mounted on the animals in holes made in their ears specifically for this purpose, Though! identification was still done manually.This was the situation for cattle and other commercially raised animals and there was no system however for pets too.Therefore pet owners always had problems when it came to identifying lost pets.

Injectable RFID tags are now available.They are injected to remain under the skin of the animal while delivered through a special syringe, their advantage is that they are less painful also there is no outside identification mark for a malicious person to know where the tag is embedded in order to remove it or modify it.The RFID chip inside the tag is generally ‘Read-Only” so that data once recorded cannot be modified.

a. Was not painful to the animal.  
 

b. Visible only to an RFID reader.

1. The government or other statutory authorities may mandate that all animals should be tagged   whether pets,cattle,livestock or endangered wild species. 
    
2. Pet tagging would have the records of pet health easily available including vaccinations for, say! The rabies vaccine which is normally given to pet dogs.Livestock tagging would enable government monitoring of the food chain.