Uh, in a kinda fucked up way ngl:

RatX® coats the lining of a part of the rodent’s lower gut. This coating of the “fine hairs” in the lower gut, called villi, disrupts the messaging system to the rodents brain, causing it to stop drinking water. This leads to dehydration, blood thickening, kidney dysfunction, coma and eventual death. It also leads to a prcoess called "mummification", which means the body of the diseased rodent will dry out, rather than decompose normally. This means a 95% reduction in smell.