My duck is one year old. She has been gasping and head shaking along with that noise for 3 months now (see the two links attached of videos at the bottom). She does this 24/7 although it slightly stops when she is sleeping. I dosed her for gapeworm using Zerofen fenbendazole last week but I have seen no improvement. She lives with 3 other ducks and 3 hens and they are all fine so i don't think she has anything contagious. She is eating and drinking like a normal duck and swims in the water. Although I do think she finds it uncomfortable when she eats her ration. When she does lie down her tail bobs up and down. She is constantly gasping for air. Has anyone seen anything like this? Please help thanks very much. PLEASE WATCH THE VIDEOS ATTACHED
https://linksharing.samsungcloud.com/oTuzIpEOYRv2
https://linksharing.samsungcloud.com/cU9dDoQbDpQU
https://linksharing.samsungcloud.com/oTuzIpEOYRv2
https://linksharing.samsungcloud.com/cU9dDoQbDpQU