Unlike other Zelda games (where you got attacked if you hit the Cuccos), in Twilight Princess if you hit a Cucco about 8 times, you'll be able to control it for a short period of time.

Go to the fishing hole, and find the sign that says: No Littering! You can get a bottle if you fish on the left side of the bridge that is near that sign. Its darker water than normal.

To obtain the Sinker Lure you must first catch a Hylain Pike, Hyrule Bass, and a Ordon Catfish in the fishing hole area with the lure rod. After you have caught one of each you go to the south east corner of the water closest to the house and take out your Fishing Rod(bobber). After that you will catch the Sinker Lure. Make sure Hena doesn't see you use it or she will take it away.

Donate 1000 rupees to Goron inside the Malo Mart in Kakariko Village (you must progress past the third dungeon beforehand). Talk to the old Goron outside the shop and complete the quest he offers. Once completed, the second donation amount will be reduced from 2000 to 200 rupees.