No. But they would if they fell off. If they fell off or came off by other means then they need to be replaced. But otherwise, if they stay on the bovine for that bovine's life, they do not expire.
Not all ranchers do. Microchipping every animal can be quite expensive, and it's often much more cheaper to use eartags to track their cattle.
yes they do expire.
No they do not expire!
does ajinomoto expire
This milk will expire tomorrow.You coupon will expire next week.
It depends on the identification legislation in your country. In Australia, all sheep and goats are required to have a tag in their ear with the Property Identification Code written on the tag when the sheep or goat leaves its property of birth.
No, they do not expire.
Expire is a verb.
No, it doesn't expire.
No, after you purchase your account, it will not expire.
No but the credit can expire.
120 months they expire