Symptoms of canine urinary-tract infections (UTIs) include more frequent urination, crying out when urinating, blood or pus in the urine and having accidents in the home. A dog with chronic UTIs may have another underlying health condition.
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Stones
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According to Dog Owner's Home Veterinary Handbook , urinary stones can be the cause or the result of chronic dog UTIs. They are started by invasive bacteria.
Other Symptoms
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If the dog is drinking a lot more than usual and has recurring UTIs, it could have diabetes.
Medication
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According to veterinarian Dr. Debra Primovic, if the dog has been put on a new medication such as cortisones, this may suppress the dog's immune system and make it more prone to recurring UTIs.
Behavioral
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According to Primovic, if a dog is nervous or fears being attacked while urinating, it may intentionally hold urine in the bladder, resulting in infection.
Warning
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Since there are many reasons that invasive bacteria can invade the bladder, urinary tract and cause a UTI, diagnosis must be done by a vet in order to get proper treatment.
Worst Case Scenario
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Tumors of urinary system can also cause recurring canine UTI's.