Weighing and selling live chickens is perfectly permissible, as what is being sold (i.e. the chicken) is known and fixed. Thus, there is no problem as per the Shariah in selling chickens by weight. As given in Badaa’i Us Sanaa’i, Kitaab Ul Buyoo.
And Allah Most High knows best.
Mufti Hafidh Syed Ziauddin Naqshbandi Qadri
[Professor, Islamic Law, Jamia Nizamia,
Founder-Director, Abul Hasanaat Islamic Research Center]