The short answer
Look at what is on the ground: empty shells are different from whole seeds. Identify the material and watch the feeder before deciding that birds dislike the food.
Collect a small visual sample
Without leaving material to accumulate, note whether the debris is mostly hulls, whole seed, or mixed fragments. The distinction helps you decide whether to compare foods, adjust dispensing, or improve cleanup.
Watch the hardware
Check that openings match the food and that the feeder is assembled as directed. Movement, a loose part, or an unsuitable seed size can change how food leaves the container. Avoid attributing every spill to bird behavior.
Treat a tray as extra maintenance
A catcher can collect material, but it also creates another surface to inspect and clean. Before adding one, ask whether you can reach it easily and whether water drains. It is not a substitute for maintaining the area below.
At a glance
| What you see | What to investigate |
|---|---|
| Mostly empty hulls | Shell cleanup or hulled-food comparison |
| Whole seed | Food selection and port compatibility |
| Spills during movement | Assembly and stability |
| Wet accumulation | Drainage and cleaning routine |
Sources & evidence
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