La uterus infection in bitches that are not spayed it is something that can happen at any time. That is why sterilizing them is one of the best ways to prevent this and other ills.
When bitches get uterus infection, this can lead to a kidney dysfunction, to blood poisoning and even death. That is why this has to be prevented, or avoided with the recognition of the symptoms, to go to the vet.
The way to prevent an infection of the uterus is by spay the bitch. If you do it before the second heat, you will also be preventing breast cancer. In this way, your dog will be safe, since the infection is more frequent when they are older and in large dogs.
If you have not spayed your dog, you must take special care to recognize the symptoms. Infection occurs three to six weeks after the bitch is in heat, so be vigilant. The symptoms are varied. You will notice the dog down, she will drink a lot of water and urinate a lot. At first you may not notice anything special, but with progress, pus will secrete from the vagina, you may have loss of appetite, vomiting or fever.
When you notice these symptoms, you should go immediately to the vet, since otherwise, the bitch may suffer kidney failure. At the vet, they will do a blood test to determine the status of the infection in the blood and kidneys. She may need high doses of antibiotics and be admitted. If the bitch is young, the best option is to sterilize her, since if we do not do it, in the successive occasions in which she is in heat she may contract the infection again. If she is older, an antibiotic will be given after the heat, since operating on her can be dangerous.
More information - Benefits of spaying or neutering