My dog killed a rat, now has fever and lethargy. What should I do?

[Rabies](https://www.petcoach.co/dog/condition/rabies/) in rats and other small rodents is extremely rare. I would be more concerned with the possibility that the rat had been poisoned elsewhere and its weakness was why your dog was able to catch and kill it. Leptospirosis, an infectious disease that affects the liver and/or kidneys, is also a high risk from contact with rats. Other possible diseases your dog could contract from contact with rats are: • Rat Bite Fever (*Streptobacillus moniliformis* form). Dogs can be infected by the bacteria by biting or eating infected rats. Dogs do not themselves get sick, but serve as carriers for the infection, passing it along to humans. • [Tularemia](https://www.petcoach.co/article/tularemia-rabbit-fever-in-dogs) is caused by the *Francisella tularensis* bacterium. Rabbits, hares and rodents, including rats, are particularly susceptible to the organism, and often die in large numbers during an outbreak. If a dog eats a rat (or other animal) infected by this organism or drinks water contaminated by infected rodent waste, the dog can become ill as well as passing the disease on to humans. Symptoms in dogs include refusal to eat, fever, cough, vomiting, and diarrhea. If not caught and treated, it can lead to death. In humans the symptoms are specific to the mode of infection (deer fly, ticks, contaminated water, handling dead infected animals, etc.) but can include: chills, eye irritation, fever, headache, joint stiffness, muscle pain, ulcers on skin, shortness of breath, sweating and weight loss. • [Bubonic plague](https://www.petcoach.co/dog/condition/plague): dogs can become carriers of the *Yersinia pestis* bacterium if they are bitten by the flea of an infected rat. Dogs do not tend to be sickened by bubonic plague but can pass the disease on to human caretakers. • [Salmonellosis](https://www.petcoach.co/article/small-pet-rodents-can-pose-a-salmonella-risk-to-humans) can be transmitted to a dog that encounters the fecal material of rats, other rodents and especially reptiles. Symptoms in canines include: fever, diarrhea, dehydration and shock. Death can occur if untreated, and the dog can spread the infection to human through its feces.

I am so sorry to hear that Leo has been bitten and does not seem to be feeling well as a result. Unfortunately, given that it was a rat which it him, as well as he fact that Leo now has a fever and seems unwell I would suggest a trip to the veterinarian for as soon as possible. It seems highly likely that Leo has an infection from the bite. Especially considering that Leo is such a young pup, it is important that he is seen soon. His immune system is not fully developed and therefore may not cope as well in fighting the infection as an adult dog.

You are correct that the rat can carry diseases. I recommend to call your veterinarian and tell them what happened. They may want to check him for any bites and booster his vaccines. The main concerns for rats are Leptospirosis and fleas who can carry plague depending on where you live. Theoretically, rabies and rat poison ingestion would also be a risk. Your veterinarian will be most familiar with your local environment and the potential diseases. Also make sure Brady is up-to-date on his flea prevention. Best of luck and please feel free to post any additional questions.

There are a couple things you should be concerned about, if your dog is not vaccinated then leptospirosis is a concern as Rats carry it and it is a serious disease in dogs (affecting the kidneys and liver). the main second concern is rat poison, if the rate ingested rat poison in the past couple weeks, then your dog could be poisoned too, these poisons are usually blood thinner which cause an animal to bleed to death, often it has a delayed action and the treatment for that is vitamin K, which must be given by your vet by injection first.

Examine your dog for any sign of injury due to the fight with the rat (if any). If any (which is likely, sometimes even inside the mouth) take him to your veterinarian for an examination. Disinfection can eventually be started at home with very diluted hibiscrub or betadine or salted water baths. Buster collar may be useful as well to avoid licking/scratching at the wound. If your dog is not vaccinated for Leptospira, take him to your local vet anyway. Antibiotics may be needed. Please do not hesitate to contact us again on the forum or by requesting a consultation if you have any more questions or to discuss it any further.

In these cases close monitoring is needed both for any possible wound/injury from the fight and possible poisoning (some of these rats can be poisoned with rodenticide). Any external wound, lethargy, inappetence, signs of cough, vomiting or diarrhoea should be checked by your local vet.

There is nothing to be done to prevent Toby from developing rat bite fever if he has been exposed. You will need to monitor him for lethargy, fever, loss of appetite or anything else out of the ordinary. An exam with your veterinarian would be recommended if Toby develops any symptoms. A course of antibiotics can be used to treat infection.