Each bowl needs to be suitable for dishwasher treatment, including coatings, rubber bases or electronic feeders. The label and maker's care requirements matter.
Understanding this situation
Large food remnants should be dealt with appropriately before loading, and a bowl nested inside another can shield surfaces. A feeding accessory may also require its own cleaning process beyond a generic wash.
A useful next step
Use the specified care method and secure suitable items with clear spray access. Do not assume a clean outside confirms every hidden seam or valve is clean. Follow relevant hygiene guidance where a particular household situation requires it.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.