A method for fastening a thread (24) to a tampon (10), in particular a veterinary tampon, comprising the steps of passing the thread through the tampon by means of a needle (12, 14), and knotting the loose ends of the thread, wherein that the step of passing the thread through the tampon comprises: -piercing the tampon (10) with two hollow needles (12, 14), -inserting the distal ends of the needles into a mould (20) that forms a passage (16) interconnecting the open ends of the hollow needles, feeding the thread (24) to the proximal end of one (12) of the two needles, -applying a suction pressure to the proximal end of the other (14) of the two needles, -opening the mould (20), and -withdrawing the needles (12, 14) from the tampon (10).
