I have two ducks that are 5 months old and one of them did a poop yesterday that really has me worried. It was the usual colour after a visit to the park (very dark brown because they spend their whole time with their beaks in the soil) but there were quite a few stones in there. It was actually mostly stomes but the rest was completely undigested worms, slugs and even a caterpillar? It's the first time I've seen their poop like this. If anyone could help that would be great.