How does salt keep rats away?

Salt can deter rats because it disrupts their hydration balance and can cause dehydration when ingested in large quantities. Rats are sensitive to extreme changes in their diet and environment, and the high salinity can make food sources less appealing. Additionally, excessive salt can lead to health issues for rats, discouraging them from areas where salt is present. However, while salt may help in some cases, it is not a foolproof method for rodent control.