Question:

To prevent chickens from fighting amongst themselves the tip of their beaks are clipped off. Apparently this part is hard and has no life in it so cutting should not be harmful. Nevertheless, how is it from a Shar’ee perspective?

Answer: حامدا ومصليا ومسلما
It will be permissible based on the aforementioned interest.

ويجوز فصد البهائم وكيها وكل علاج فيه منفعة لها. (الدر المختار على هامش الشامي 5:530)

And Allah Ta’aalaa knows best
(Hazrat Mufti) Ahmed Khanpuri (May Allah preserve him)
Mahmoodul Fataawaa 2/489