According to the Mayo Clinic, proteinuria, or high protein in the urine, is a likely cause of foamy pee. According to Vetinfo, excessive protein in urine may suggest kidney disease or other dangerous conditions.
Proteinuria is commonly caused by damage to or disorders of the kidneys and liver, but it can also signal an infection of the urinary system, according to Vetinfo. Infections of the urinary tract can affect the composition of urine and lead to elevated protein levels. Cancer is a potential cause of the disorder, as are immune diseases that lead the body to attack its own tissue. Some cats are genetically predisposed to developing this ailment, as are cats with diabetes and Cushing’s disease. It can be caused by lungworm, heartworm, and Lyme disease, all of which are parasitic infections.
According to Vetinfo, the cat may also have frequent urination, increased water intake, weight loss, decreased appetite, jaundice, and agitation, depending on the underlying cause. The severity of proteinuria is determined by a veterinarian’s urine study and comparison of protein to creatinine levels. To determine the underlying cause of proteinuria, more tests are required, and therapy depends on the underlying reason. Reduced protein intake is beneficial for cats with renal problems.