Cuccos are Hyrule's finest chickens. In order to get your second bottle, you must talk to the lady by the chicken pen in Kakariko Village. She will tell you that her Cuccos have ran away and ask you to find them for her. There are seven Cuccos scattered all over the village. Keep this in mind though, if you enter a house or leave the village the Cuccos will escape and you will have to re-catch them.