I noticed this morning my two of my ducklings neck were swollen and spongey feeling. When I touched it to see how it felt the one duckling spit up slobbers mixed with food. I have read about ruptured air sacs, and that you can release the air with a needle. Are they ok to stay with the other two or should I keep these two separate? I don't want to try to do anything if it will heal itself but I honestly don't know if this is considered a bad rupture or not. Please help!