Effects of Temperature on the Microbial Growth and Quality of Unsealed Dry Pet Food during Storage

Dongbin Park1, Hyun Jung Lee1, Anand Kumar Sethukali1,2, Dong-Gyun Yim3, Sungkwon Park4, Cheorun Jo1,5,*
Author Information & Copyright
1Department of Agricultural Biotechnology, Center for Food and Bioconvergence, and Research Institute of Agriculture and Life Science, Seoul National University, Seoul 08826, Korea
2Department of Animal Science, Faculty of Agriculture, University of Jaffna, Kilinochchi 44000, Sri Lanka
3Department of Animal Science, Kyungpook National University, Sangju 37224, Korea
4Department of Food Science and Biotechnology, College of Life Science, Sejong University, Seoul 05006, Korea
5Institute of Green Bio Science and Technology, Seoul National University, Pyeongchang 25354, Korea
*Corresponding Author: Cheorun Jo. E-mail:

© Copyright 2024 Korean Society for Food Science of Animal Resources. This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Received: Apr 19, 2024 ; Revised: Jun 07, 2024 ; Accepted: Jun 18, 2024

Published Online: Jul 09, 2024


Dry pet food is a convenient option for pet owners, but its storage conditions can impact its microbial growth and quality. In this study, we examined the effects of storage temperature on the quality and microbial growth of dry pet food. The pet food was stored at 25°C (D25) and 35°C (D35), respectively, and samples were analyzed on days 0, 30, 90, and 120 for microbial growth and quality attributes such as pH, color, lipid oxidation, and volatile basic nitrogen. While no initial microbial growth was observed due to the low water content and water activity, quality attributes showed changes over time. However, the changes were negligible, indicating that dry pet food remains feedable for up to 120 days even at a storage temperature of 35°C. These findings suggest that dry pet food can be safely stored at room temperature or up to 35°C without compromising its quality.

Keywords: Dry pet food; Storage temperature; Microbial growth; Quality