Rama: 87:10ֲ - What does the Rama say about leaving milk in the keiva of the animal?

לכתחלה אין להניחו בקיבה עד שיצטנן החלב בתוך הקיבה אבל בדיעבד אין לחוש עד) שנמלח בקיבתה או שעמד בו יום אחד (ואז) אסור להעמיד בו: Milk that was found in the stomach [of the animal] from the outset one should not leave it in the stomach until the milk that's in the stomach cools off, but after the fact, there is nothing to worry about until it was salted in the stomach, or it stood in it for a full day, [then] it is forbidden to curdle milk with it.