Need help, I know nothing about ducklings

[Scorpy89]

I am so happy for you! Is that the duckling in your avatar?

yes, he is.
There's something I'd like ask you, I found your thread on Duck poo and was checking on it when I received an alert on my post.
Most of the poo is solid and appears normal, but sometimes it starts coming out normal but then toward the end of his bowel movement it will be foamy, and the foam will eventually go away and be a wet spot.