Is it to soon to add rooster?

Too early to add an adult rooster. Ideally try to find a a rooster that is younger than your pullets by a few weeks. Or just wait longer and then add a mature rooster.

My tip is to add an old rooster - over a year or 2 old, rather than a young one. The younger ones seem fore aggressive and tread the girls roughly. I think its because they have lots of teenage hormones and have not learnt to treat the girls with manners!