Ata bin Yasar (may Allah have mercy on him) narrates from a man of Banu Harithah (may Allah be pleased with him) that he was grazing she-camels on one of the hills of Uhud. He saw one of the she-camels dying and found nothing with which to perform nahr, so he took a wooden peg and struck it into the she-camel's labbah, so that the blood flowed. Then he came and told the Prophet (peace and blessings be upon him), and he (peace and blessings be upon him) commanded that it be eaten.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الضحايا / 19149