Sufyan bin Sa‘id Ath-Thawri سفيان الثوري · Chapters on Slaughtering

“Avoid those that are lactating.” (i.e. those from which milk is received).

“The Messenger of Allah (ﷺ) forbade tying up animals.”

“We asked the Messenger of Allah (ﷺ) about the fetus. He said: ‘Eat it if you wish, for it is considered legally slaughtered with the slaughtering of its mother.’”