Is a sacrifice valid if a defect preventing fulfillment arises after it has been designated for Udhiyah?

Primary text

If a valid, sound animal is designated for sacrifice, and subsequently a defect arises that prevents its fulfillment (ijza'), sacrificing it suffices. This view is held by 'Ata', Al-Hasan, Al-Nakha'i, Al-Zuhri, Al-Thawri, Malik, Al-Shafi'i, and Ishaq. The evidence for this is the report from Abu Sa'id that they purchased a ram for sacrifice, and a wolf injured its flank. When they asked the Prophet, peace be upon him, he commanded them to sacrifice it. The reasoning is that a defect occurring in the obligated sacrifice does not prevent fulfillment, similar to a defect occurring during the act of slaughter. It is further argued that the obligation is attached to the specific animal itself, not merely an obligation in the debt (dhimmah).