## 4 Discussion  
In this study, we found that, due to the low accuracy of the dynamic weighing of poultry, the impact of feed drop on the actual feed intake, and the competition between young birds creating errors in the measured value, there are some differences in the measurement of body weight changes and feeding behavior of young chickens. To improve the dynamic weighing accuracy of poultry, we used circuits to amplify, filter, and denoise the weight signal, and then performed digital filtering through the median mean filter. We achieved a static weighing accuracy of 0.82 g and a dynamic weighing accuracy of 2.164 g, while the feed scale and drop scale accuracy were 0.108 g and 0.259 g, respectively. The system developed in this project added a drop weighing scale for the amount of feed dropped and calculated the actual intake of each feed by establishing the difference between the feed consumption and the amount of feed dropped. To solve the problem of crowding by multiple chicks introducing errors into the measured value, we developed a single passage that only allows a single chick to pass through, to realize single feeding and accurately measure the body weight changes and feeding behavior of the chicks. As a result of the experiment, the feeding behavior of chickens, as well as their body weight change, \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline
**Day** & **1** & **2** & **3** & **4** & **5** & **6** & **7** & **Mean** \\ \hline Average weight of chicks (g) & 208.55 & 221.65 & 233.26 & 244.31 & 248.37 & 253.53 & 270.76 & – \\ Feed weight decrease (g) & 422.09 & 478.67 & 344.14 & 366.61 & 431.84 & 450.93 & 499.23 & 427.64 \\ Weight of feed dropped (g) & 121.49 & 119.23 & 56.68 & 105.44 & 151.93 & 122.71 & 125.45 & 114.7 \\ Feed intake (g) & 300.6 & 359.44 & 287.46 & 261.17 & 281.3 & 328.22 & 373.78 & 313.13 \\ Number of meals & 68 & 60 & 63 & 67 & 68 & 74 & 91 & 70 \\ Average consumption per meal (g/meal) & 6.2 & 7.98 & 5.46 & 5.47 & 6.35 & 6.09 & 5.48 & 6.14 \\ Average feed intake per meal (g/meal) & 4.42 & 5.99 & 4.56 & 3.89 & 4.13 & 4.43 & 4.1 & 4.47 \\ Average feeding time (s) & 640.9 & 631.7 & 699.1 & 620.1 & 656.4 & 593.1 & 505.4 & 620 \\ Longest feeding time (s) & 2680 (17) & 2689 (47) & 3055 (57) & 3490 (57) & 4006 (47) & 2001 (57) & 1712 (57) & – \\ \hline \hline \end{tabular} Note: (17), (47), (57), (67) are the electronic foot tag numbers of the particular chickens.  
\end{table} 
Table 2: Monitoring results for flock growth. Figure 13: One week’s feeding of a young chicken. was analyzed. Young chickens grow at a rate of about 8.88 g/day, and the FCR is about 4.4, with a body weight range from 208 g to 280 g, which proved that this system, paired with a single passage, can accurately monitor the body weight changes and feeding behavior of young chickens. We also concluded that dynamic weighing is required to improve the accuracy of live poultry weighing. Chicks leave one weight measurement each time they eat, so body weight data on the chicks can be collected multiple times in one day. Abnormal data can easily be excluded from the distribution range of the multiple body weight data of the day. As shown in Figure 12, data that are much smaller than the weight range of the day can be considered abnormal, and it can be concluded that the young chicken is not completely standing on the weight scale, so an accurate weight change rule can be obtained. In terms of the actual feed intake of young chickens, as shown in Figure 13, although there may be some fluctuations in the daily consumption, the actual daily feed intake changes are small. When food is abundant, the young chickens will rummage in the feed, and the drop amount will increase. The feed scale and drop weighing scale in this study only measure the weight when the chicken is not eating, which can be described as static weighing.