I was reading a lesson in my textbook about 〜なさそうだ when I noticed that the book never put だ before よ or ね. So it would be 美味{おい}しくなさそうよ or 美味{おい}しくなさそうね.
So I want to confirm, is adding だ before よ or ね is considered incorrect?
My logic is... Since I think I've heard about ねこですよ or ねこだよ, I thought it is okay to say 美味{おい}しくなさそうだよ or 美味{おい}しくなさそうだね. Could you please enlighten me about this ? Thank you.