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This is false. Bulls are more able to identify a cow in heat by pheromones excreted in her urine, and by her actions of trying to mount other cows, but mostly be other cows mounting her. Bulls "taste" her urine and do a flehman response by curling back is upper lip to smell if she is in heat or not or close to standing heat. A cow in heat can carry pheromones to a bull on the breeze as well, which goes to show you what farmers say when a "bull can smell a cow in heat for miles" is more true than the changes in frequency and pitch in her bellering.

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14y ago
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13y ago

Pheromones. The cow in heat gives off pheromones in her urine and feces, as well as through her skin, to alert a bull that she's in estrus and needs him to settle her ASAP.

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12y ago

Yes.

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Q: A bull is able to identify a cow in heat by changes in her moo?
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