My indian runner duckling came of of his shell 8 hours ago and was fine until now. He has started violently throwing his head back and it seems like he is goin to die. I had this problem last year with lots of ducklings but i blamed it on inbreeding ( i had bought their parents as a pair ) However i have been reading that this can also be down to a defiency in a vitamin. I had ducklings hatch 6 weeks ago and they are fine. What do i do with this duckling? He is still in the incubator and I dont have any multivitamins to give him. Any advice would be much appreciated!