If a pet bird has watery feces and the owner suspects increased drinking, what condition might the bird be suffering from?

The scenario of a pet bird exhibiting watery feces along with the owner's suspicion of increased drinking suggests that the bird could be experiencing renal failure. In cases of renal failure, the kidneys are unable to concentrate urine effectively, leading to the production of excess dilute urine. This can prompt the bird to drink more water in an attempt to maintain hydration, which could explain both the increased drinking and the watery feces.

Renal failure can lead to various systemic symptoms as well, including lethargy, weight loss, and changes in appetite, but the combination of increased water consumption and watery feces is particularly indicative.

While other conditions such as dehydration and intestinal worms can produce watery feces, they may not directly correlate with the increased drinking behavior observed in this case. Avian influenza could cause gastrointestinal issues, but it would typically present with additional respiratory symptoms and overall distress. Thus, renal failure aligns most clearly with the symptoms described.