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European companies like Mowi and Lerøy are incorporating chicken protein into fish feed due to economic pressures from the El Niño phenomenon, which has disrupted traditional fish sources. The warming of the Pacific has led to a decline in anchovy and sardine stocks, causing fishmeal prices to soar. Norwegian salmon producers have seen profits drop significantly, prompting a shift to terrestrial protein sources like chicken by-products. While studies show moderate inclusion of chicken meal does not harm fish health, concerns remain about the nutritional balance, particularly omega-3 fatty acids. Consumer trust is at risk as many view this practice as unnatural, reminiscent of past food scandals.