Aggressive Drake???

[BlueMoon-N-Farm]

My ancona drake, year and a half old, has become mean.
Not to me though, just to everything else.
He attacks the goslings when ever they get to close to his girls and then sometimes stalks them through the yard,
He killed the duckings his mate tried to hatch out, and bits at the sheep every now and then,

I think I know the answer.
Should I be looking into replacing my drake with a better tempered one? Or is this all normal behavior?
Thank you everyone for your advice in advance!

The picture uploaded is not working for some reason so I can't post a picture, but the behavior is pretty much self explanatory.

 

[sourland]

If he were mine, he would have to go. I might tolerate the protectiveness towards his mate, but killing the ducklings would have led to his demise. NO, not all drakes are like this. In my experience he is the exception.

 

[BlueMoon-N-Farm]

If he were mine, he would have to go. I might tolerate the protectiveness towards his mate, but killing the ducklings would have led to his demise. NO, not all drakes are like this. In my experience he is the exception.

Ah i thought so. I wasn't sure if this was just normal and I was to blame for not separating the ducklings from the rest of the flock.
Thank you for confirming that this is not normal behavior.