Nthendayi ndi yofunika kwambiri m'chigayo cha ng'ombe ndipo imaphwanya ma cellulose ndi zomera zina. Komabe, chifukwa chakuti ng’ombe nthawi zambiri zimakoka zinthu zachitsulo pomeza chakudya, monga misomali ya ng’ombe, waya wachitsulo, ndi zina zotero, zinthu zachitsulo zimenezi zimatha kuwunjikana m’mphuno, zomwe zimayambitsa zizindikiro za thupi lachilendo. Ntchito ya maginito a rumen ndikutenga ndi kusonkhanitsa zinthu zachitsulo mu rumen, kuziteteza kuti zisakhumudwitse khoma la rumen, komanso kuthetsa kusamvana ndi zizindikiro zomwe zimayambitsidwa ndi matupi achilendo mu rumen. Themagnet maginitoimakopa chinthu chachitsulo mwamaginito, kotero kuti chimakhazikika pa maginito, kuti chisasunthike kapena kuwononga khoma la rumen.