Vesicoureteral Reflux (VUR): This condition is characterized by the backward flow of urine from the bladder into the kidneys, which can cause cloudy urine due to the presence of bacteria or other substances. It's a common condition in children and can be asymptomatic, making it a likely diagnosis given the patient's age and symptoms.

Urinary Tract Infection (UTI): Although the mother hasn't noticed any red flag symptoms like odor or discomfort, UTIs can sometimes be asymptomatic, especially in young children. Cloudy urine can be a sign of a UTI.
Dehydration: Inadequate fluid intake can cause concentrated urine, which may appear cloudy. Given the patient's age, it's possible that she might not be drinking enough water.
Phosphaturia: This condition involves the presence of excess phosphate in the urine, which can cause it to appear cloudy. It's often seen in children and can be related to dietary factors.

Diabetes Insipidus: Although rare, this condition can cause cloudy urine due to the high concentration of glucose. It's essential to rule out this diagnosis, as it requires prompt treatment.
Kidney Stones: While uncommon in children, kidney stones can cause cloudy or bloody urine. It's crucial to consider this diagnosis to avoid missing a potentially serious condition.
Tubular Dysfunction: Certain conditions like renal tubular acidosis can cause abnormalities in urine appearance, including cloudiness.

Cystinuria: A genetic disorder that affects the kidneys and causes the formation of cystine stones, which can lead to cloudy urine.
Nephrotic Syndrome: A condition characterized by excessive loss of protein in the urine, which can cause it to appear cloudy or foamy.
Glomerulonephritis: Inflammation of the glomeruli, the filtering units of the kidneys, which can cause changes in urine appearance, including cloudiness.