What's wrong with the stuttering bird's buttocks sticky shit

Pu Pingbird's butt sticky shit is due to it because it has gastroenteritis and other diseases.It eats insects in the breeding period, and it mainly eats berries at other times, such as the fruits and seeds of plants such as oil pine, birch, rose, and honeyster.This bird is a small ring poultry, with a length of about 18 cm. It is usually inhabited in the mixed forest of coniferous forests or coniferous broad leaves. The reproductive period will be a pair of activities. In other times, there will be a group of activities, and even a group of hundreds of birds.