Here are the first three lines of no. 3. I believe I have most of this worked out.
But, I can’t find a meaning for this word in the second line: χαἰ.
Αἶγάς ποτ’ αἰγοβοσκὸς ἀνεκάλει χρῄζων
ἐπὶ σηκὸν ἄξειν· χαἰ μὲν ἦλθον, αἳ δ’ οὔπω
μιῆς δ’ ἀπειθοῦς ἐν φάραγγι τρωγούσης. . . .
For a guess I speculated that χαἰ might be a form of αἳ.
In that case, χαἰ μὲν ἦλθον, αἳ δ’ οὔπω might mean:
some came, but others [did] not