Domestic rats are highly intelligent, social animals that make rewarding companions when their needs are properly met. Understanding their requirements prevents common welfare problems.
Pet rat welfare combines high cognitive needs with significant health vulnerabilities that require proactive management. The social nature of rats means that solitary housing causes measurable distress — rats housed alone show higher stress hormones and shorter lifespans than those in pairs or groups. Their intelligence demands environmental complexity: multi-level cages with hammocks, tunnels, foraging opportunities and daily free-roaming time. Health management is critical: respiratory infections with Mycoplasma pulmonis are nearly universal in rats and require early antibiotic treatment. Female rats benefit from early neutering or ovariohysterectomy to prevent the mammary tumours that otherwise affect the majority of individuals. These health investments significantly extend quality life in an animal whose natural lifespan is already short.