What is the Chidush 'T'reifah Lo Heveisi Elecha... Genuvsi Yom u'Genuvsi Laylah'? A Shomer Sachar is liable for theft and loss!
Seforno: Yakov meant that even when Lavan demanded payment following an Oneis (irrespective of whether it was torn by an animal, or stolen by a human by day or by an animal in the night), 1 he paid up. 2
Moshav Zekenim: I paid 3 even of Tereifah due to Ones. Genuvsi Yom u'Genuvsi Laylah is what became Tereifah through a wolf or lion.
Tosfos ha'Shalem (1, citing R. Yosef Karo): Yakov explains, you cannot say that you chased after me to pay for what became Tereifah or stolen, for I already paid!
Tosfos ha'Shalem (7, citing Chatzi Menasheh citing R. Yosef Angiloni): Hashem decreed that lions tear at night, and at the start of the day, until sunrise - "Laylah... ha'Kefirim Sho'agim la'Taref... Tizrach ha'Shemesh Ye'asefun". I stole from them their entitled prey during the day and at night.
Bearing in mind that, for the first fourteen years that Yakov worked for Lavan, he was working for Rachel, how did he manage to pay for the losses in Lavan's flocks?
Refer to 29:18:1.5:1 & 2.
What is the meaning of "Anochi Achatenah"?
Rashi #1 and Rashbam: 'I would remove ('I bore the loss').
Rashi #2 (citing Targum Onkelos): 'If it was missing from the number'. 1
Tosfos ha'Shalem (5): If a lion came to tear from the flock, I seized the prey from the lion, 2 (for I knew that you would demand that I pay you for it).
Tosfos ha'Shalem (6): There was a lion that used to eat from Lavan's flock every day, before I came (Bereishis Rabah 74:11). I "sinned" through depriving the lion of its sustenance.
Targum Yonasan: If I sinned on it (If I was to blame).