Halakhah sobre Isaías 40:31

And regarding if they are practiced at this time or not, many of the great commentators have already disagreed about this. And what comes out of the discussion in the Chapter [entitled] Hazroa with the good commentary is that they are practiced today. And that is likewise the opinion of Rabbenu Alfasi, may his memory be blessed, and Ramban, may this memory be blessed. But we do not have the power over the butchers now to force them to give them to them. 'And those who trust in the Lord shall renew their strength.'