Sentence:  The hatched young ones are ſodl to thoſe who breed them up, and theſe try in the following manner whether they are hatched too ſoon or not: they take hold the little ducks by the bill, and their bodies hang down ; if they <WSD>ſprawl</WSD> and extend their feet and wings, they are hatched in due time ; but if they have had too much heat, they hang without any ſtruggling. 
Meaning of the word marked with <WSD> tags:  To spread out in a disorderly fashion; to straggle.