How long can a rat live without food? All living creatures need to consume food to survive. As omnivore scavengers, rats are one of the most adaptable creatures and can eat almost anything; they can also survive for long periods without consuming any food. However, they need to sustain themselves enough to stay still. In this blog, we will explore the lifespan of a rat, how long it can live without consuming any food, and its different habits. 

What is a Lifespan of a Rat?

A study that was conducted estimated that rats have an average lifespan of 1.8 years. 5% of rats, it is estimated, have life spans of three years or longer.

A rat’s lifespan is often highly individual and determined mainly by its environment, genetics, and diet. It follows that a rat can live up to three years or longer provided it lives in a secure environment, has enough food and water, and is genetically healthy.

What Happens When a Rat Doesn’t Eat? 

A rat will begin to lose weight if it doesn’t eat. This is a result of their body depleting its reserve energy to maintain life. The rat will eventually succumb to exhaustion.

Rats can, therefore, go for extended periods of time without nourishment. When it comes to fasting, they are far hardier than other animals. A rat will eventually starve to death if it is not fed.

How Long Can a Rat Live Without Food?

It is impossible to say how long a rat will survive without nourishment. A rat’s life span is also highly dependent on its organism. Most would survive for a week, but no longer than two weeks, without food.

A fact about rats is that they are like squirrels; they enjoy storing their food. Even if their food supplies are cut, they would still have enough reserves to last a while.

How Long Can a Rat Live Without Water?

Since they are little animals, rats don’t require as much water as they do food. The food they consume provides them with water. Rats are the reverse of humanity. Rats survive longer without water than they would without food, although humans can only go for a few days without food and a few weeks without water.

How Long Can Rats Live After Consuming Poison?

The kind of poison applied to the rat will determine the answer. There are three main categories, and each behaves differently and completes tasks at a different pace.

Anti-Coagulating Agents

These rat poisons have the slowest rate of action. They have an impact on blood coagulation, and the rat will pass away in a few days. Fumaric and warfarin are two common anticoagulants.


These poisons, which are neurotoxins, act the quickest. The rat is killed in a few hours once the liver and brain are attacked. A rat can pass away from the toxin after just one feeding. This poison should not be used by anyone who owns pets.

Vitamin-based Poisons

These poisons inundate the rat’s body with one of the fat-soluble vitamins (vitamins A, D, E, and K). It takes about a day for these poisons to kill the rat.

Get Rid of Rat Problems Today With Bay Area Rodent Solutions. 

There are many ways to get rid of rats. Some methods include DIY procedures, mouse traps, and even rat poisons. When a rat dies in your home, it is usually inside walls and floorboards, bringing more extensive destruction and a disastrous smell. Before waiting for this moment, call a professional pest control like us, Bay Area Rodent Solutions, quickly. No other company in the Bay Area offers their level of expertise and signature approach to rodent exclusion like ours. We’ll assist you in avoiding a repeat infestation and eliminating the current one. Please send us a message or call at 877-301-7826 right away for the guaranteed removal of these rats.