Feral cats are widely considered to be leading the potential impacts on public health. This study aimed to provide estimates of vital data for feral cats relating Trap-Neuter-Return (TNR) to establish strategies effectively to manage feral cats in Pyeongtaek. Thus, this study focused on estimating feral cat population in Pyeongtaek and conducted a comparative analysis of the data for feral cats in Seoul (2013). The number of feral cats was estimated from 23,069 to 26,655 in Pyeongtaek, 2019. In relation to human population, when comparing the number of feral cats of Pyeongtaek and Seoul, it ranged from 4.57% to 5.28%, and from 1.97% to 2.55% respectively. This showed that Pyeongtaek was higher than Seoul. Fewer kittens were found in high-density areas, which the TNR project is believed to be generally effective in controlling the number of feral cats. In conclusion, in urban and rural complexes such as Pyeongtaek City, the number of feral cats compared to the population was higher than that of Seoul City, and the TNR program is believed to be somewhat effective in controlling the number of feral cats. When implementing TNR, it is necessary periodically to investigate the population and reflect them in policymaking.

The increase of feral cat population due to man-made activities, such as cat-mom activities, has become a social problem, although cats have lived with humans for a long time worldwide. Nevertheless, in Seoul City, the effectiveness of Trap-Neuter-Return (TNR) management plan has not been evaluated yet. In this study, we calculated the population size of feral cats in Seoul City, which is useful information for feral cat management. Seoul City was divided into 196 areas based on 2012 TNR density data. In each group, 3 areas were selected for a total of 9 areas. Out of those, 6 areas (3 apartment and 3 non-apartment areas) that could be clearly separated by mountains, rivers or roads based on Seoul City Geographical Information System (GIS) were finally selected and they were representative of the two different residential styles (44.21% apartment area and 55.79% non-apartment area). Population size of feral cats was estimated from 3 on-site surveys over 3 days. The results of the survey showed that the population of feral cats in Seoul City ranged between 209,772 and 272,816. Results of this study will be used to develop a policy to control and manage the population of feral cats.

Miniature pigs have been marked as a source of providing organs for xenotrans plantation. In order to produce gnotobiotic miniature pigs in large numbers and perform experiments, it is necessary to implement a specially designed isolator that provides a space completely isolated from the outside, enabling researchers to control the microbiological environment. Conventional isolators have gaps on the floor net that cause accidents such as pigs getting their hooves caught. Some pigs have shown maldevelopment and abnormalities in the hind limbs. The goal of this study was to design an isolator floor for secure the sole of a foot while swine had not received undue stress with slippery flooring. We created a gradient on the isolator floor and used a single-body panel to eliminate gaps and used a checkered panel to prevent pigs from slipping. We also implemented an exhaust at the end of the gradient to collect excrement and urine. Raising miniature pigs for five months in the isolator floor invented by this study. This study compared the serum chemistries, cortisol levels to physiologic evaluations and lesions on their soles. Serum cortisol value was higher in conventional isolator floor pigs than newly developed isolator floor pigs. We observed lesions on their soles of a foot but we found no lesions and abnormalities in new type of isolator floor. This new type of isolator floor can secure the sole of a foot in pigs. The current design is developed for miniature pigs in isolator floor, but it can easily be adapted for other animals or other fields.