Correct me if I am wrong.
Latino2 chase YangNiu. He also chases TuNiu.
You can not say "He chase TuNiu too"
unless first statement is Bluesea chases TuNiu.
Similarly,
Latino2 chase YangNiu. Bluesea chases Yang Niu too.
But you can not say Bluesea also chase Yang Niu
because what changes here is subject not object