Which of the following negatively impacts feed intake during high temperatures?

Lower feed palatability negatively impacts feed intake during high temperatures because animals may become less inclined to consume feed that does not satisfy their taste preferences or that feels unappealing in hot weather. High temperatures can affect the sensory attributes of feed such as flavor, aroma, and texture, leading to a decreased willingness to eat. When animals are faced with uncomfortable temperature conditions, their focus may shift to regulating body temperature rather than searching for and consuming feed, which can further exacerbate the situation if the feed is not appealing.

On the other hand, increased hydration levels can actually encourage feed intake, as an adequate water supply is essential for maintaining health and can help animals cope with heat stress. Increased metabolic activity is a natural response to heat but can also lead to a decrease in feed intake, as animals may consume less to minimize energy expenditure. Improved nutrient absorption typically indicates a more efficient digestive process, which is generally a beneficial situation that would not contribute to decreased feed intake. However, during periods of heat stress, comfort and palatability might weigh more heavily than nutrient absorption.