Slitting the ears of cattle is from Satan- - -

Verily, I will mislead them, and surely, I will arouse in them false desires; and certainly, I will order them to slit the ears of cattle, and indeed I will order them to change the nature created by Allâh." And whoever takes Shaitân (Satan) as a Walî (protector or helper) instead of Allâh, has surely suffered a manifest loss

An-Nisa 119