You can attach the Moocall RFID tag to your cow with a regular universal tag pliers.
Before you go attaching it to the cow, however, make sure that you've taken these two important steps:
Scan the tag label into the app
Input the cow's own ID/Name
Once that's done, tag your cow. The best place to tag them is outside the ordinary ear tag.
If you don't want to put another hole in the cow's ear you can attach the Moocall Tag to the management tag.
However, when you do this bear in mind that this could increase the risk of losing one or both tags from the ear.
If you do this, make sure the main body of the Moocall RFID tag and the logo is not behind the other tag.