Since you can't keep him separated, I would rehome him. When you are given birds, you never know their background. Sometimes they are given away just because they are "trouble." Every flock does not need a rooster. But somehow everyone(new members especially) tell us they just got 1 hen and 1 rooster thinking they needed a matched set. Unless you need fertile eggs for hatching or selling - there is no need for a rooster. Even tho you wanted the silkie as an incubator - you could just buy fertile eggs of any breed you wanted & put under her.
You can't tell absolutely whether he injured her or not. Silkies are very prone to damage from a bump or peck to the head. It can cause neurological symptoms like her tic. If she has swelling of the brain - sometimes a vet will put on prednisone. You may want to check this out.
You can't tell absolutely whether he injured her or not. Silkies are very prone to damage from a bump or peck to the head. It can cause neurological symptoms like her tic. If she has swelling of the brain - sometimes a vet will put on prednisone. You may want to check this out.