Eu nu am opt câini, eu am patru câini. Ele sunt mici.
Are they all female dogs? If yes, then saying ele puts emphasis on that fact, which is fine. But if not, then you should say ei instead of ele. Also the second mention of câini can be dropped.
I was thinking about that, yes, but wasn't sure what the female version of "câine".
cățea (pl. cățele)