Shabbos 4:2-5:1

Shabbos 4:2

One may insulate hot pots using animal hides, and hides may be moved on Shabbos; one may insulate using sheared wool but it may not be moved on Shabbos. So what does one do? He removes the lid from the pot and lets the wool just fall away. Rabbi Elazar ben Azariah says that he tilts the pot and removes food so that he doesn’t remove it from the insulation because he will be unable to replace it. The Sages say that he can remove the pot and replace it. If one did not insulate the pot before Shabbos, he may no longer do so once Shabbos arrives. If he wrapped the pot to insulate it and it got unwrapped, he may re-wrap it. One may fill a jug with cold water on Shabbos and place it under a pillow or a cushion to keep it cold.

Shabbos 5:1

With what may an animal go out and with what may it not go out? A camel may go out with a bit in its mouth and a female camel with a ring in its nose. A burro may go out with a halter and a horse with a chain around its neck. All animals that wear a chain may go out with it on Shabbos and be led with it. One may sprinkle these chains (with the water containing the ashes of the red heifer) and immerse them (in a mikvah) while still on the animal.