To date, the ULTRA FLEX TST-L is the only official sampling tag approved for genetic evaluation of ear biopsy available on the market. It is manufactured in France and can be ordered in the same way as conventional, electronic, and sanitary sampling (BVD) official tags. It is applied at birth, allowing for identification and DNA sampling in a single step, unlike other solutions that require an additional procedure performed later, which also involve the intervention of a technician (blood sampling, hair) and more significant restraint than at birth, leading to more stress for the animal and its breeder, and a risk to their safety.