The HDS relied on the technological breakthrough due to the improvement of radiological analysis (digital X-ray): such technology was used to check the performance of the RFID bolus (composed of a RFID device: transponder, and a ceramic case)directly on farms, in relation to its retention and the functioning of the transponder (carrierof the electronic individual code, EIC) in the animal body.ed manual of operations for EID problem solving was drawn up to support an experimental help desk service (HDS).