Why does the Torah refer to "Eiz" which is feminine, when "ve'Hikrivo" later in the Pasuk, is masculine?
Ramban #1 (citing Targum Onkelos), Moshav Zekenim and Targum Yonasan: The Torah is referring to the species (of Eiz), 1 not to the goat itself.
Ramban #2 and Moshav Zekenim: The Torah is simply not particular about gender when it comes to animals, seeing as in most cases, the male and female species do not have different names. 2 Consequently, even where they do, 3 the Torah will refer to 'Seh' and 'Shor' 4 even when it is speaking about a female animal. 5
Like the Torah did specifically above, in Vayikra 1:10 (Ramban).
Such as Gamal, Chamor, Shafan Arneves and Chazir among the animals, and Tor and Yonah among the birds (Ramban).
Such as Shor and Parah, Kesev and Kisbah, Tayish and Eiz (Ramban).
Instead of Kisbah and Parah (Ramban).
See for example 22:28. (See Ramban who cites other examples).