What major maintenance consideration arises from the fabric construction of a mesh sock feeder?
Answer
They retain moisture readily, potentially causing spoilage like mold or aflatoxin growth in oil-rich seeds.
Sock feeders, being constructed of mesh fabric like nylon, possess a significant drawback related to moisture management. Fabric materials readily absorb and retain dampness, creating an environment where oil-rich seeds, such as Nyjer seed, can rapidly spoil. This retained moisture accelerates the growth of dangerous substances like mold or aflatoxin, posing a serious health risk to the feeding goldfinches. Consequently, sock feeders necessitate more rigorous and frequent cleaning or outright replacement compared to hard-sided feeder designs to mitigate this hazard.

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