(Mishnah): [If one is Mudar Hana'ah from his friend, the Madir] may separate Terumah and Ma'aser for him with his knowledge. He may offer for him Kinim of a Zav, Zavah or Yoledes, Chata'os and Ashamos;

He may teach to him Medrash, laws and Agadata (non-Halachic teachings), but not Mikra (written Torah). However, he may teach written Torah to his children.

He may feed his wife and children, even though [the Mudar] must feed them;

He may not feed his animal, whether it is Tamei or Tahor;

R. Eliezer says, he may feed his Tamei animal (RAN - extra food, if it is already being fed), but not his Tahor animal;

Chachamim: What is the difference between Tamei and Tahor?

R. Eliezer: The soul of a Tahor animal is Hash-m's, but the body is [the Mudar's. It gets fatter, and he may eat it.] A Tamei animal is entirely Hash-m's.

Chachamim: Even a Tamei animal, he owns the body. If he wanted, he may sell it to Nochrim, or feed it to his dogs!

(Gemara) Question: If one fixes another's Peros (declares his own Peros to be Terumah and Ma'aser to exempt his friend's), who has Tovas Hana'ah of the Ma'aser (decides to which Levi to give it)?

Answer #1 (R. Avahu): It is of the one who fixed it.

Answer #2 (R. Ze'ira): It is of the owner of the Peros [that were exempted].

R. Ze'ira holds like he taught elsewhere, for R. Ze'ira said in the name of Reish Lakish 'if one separated Korban Nazir or Korban Metzora for another, the one who gets atonement from it, he can make Temurah from it. (It is considered his Korban.)

Question (against Reish Lakish - Mishnah): He may separate Terumah and Ma'aser for him with his consent. (If the owner has Tovas Hana'ah, he gives to him Tovas Hana'ah of the Madir's Peros!)

Answer: The case is, he has no Tovas Hana'ah in them. (He may not use the Tovas Hana'ah, for then he would benefit from the Madir. Alternatively, the Madir stipulated 'on condition that you do not get Tovas Hana'ah.)