Milking Shorthorn's.
The Brahman breed is the most heat tolerant, originating from India.
Oestrous is when the cow shows "heat" meaning she is ready to be bred.
It's the same for all cattle: they cycle every 17 to 24 days, with the heat periods themselves lasting for only 24 hours.
Jamaica Hope cattle is a dairy breed that originates from Hope Farm in Jamaica. Breeding of this type of cattle started in 1910. It was actually an attempt to develop a breed that can adjust to the climate in the island. The cattle has high tolerance for heat, to ticks, and to tick-borne disease. It is also known as Jersey-Zebu or Montgomery-Jersey.
It's just how that breed has adapted to the heat, and can handle it better.
They should be bred so they calve when they are two, you can breed them around 15 months of age, if they are showing healthy heat cycles and are at a healthy weight.
okay the pompeii worm is most heat-tolerant
Some types are
They are known as the "profit breed". Beefmaster cattle are 50% Brahman, 25% Hereford, and 25% milking shorthorn. They were developed to withstand high heat temperatures, and originated in Texas. They are dual purpose (they can be used for milk production or beef production), they have a great disposition, fertility rates, carcass weight, and a good carcass conformation.
okay the pompeii worm is most heat-tolerant
Yes. When this happens cattle can get heat stroke or heat exhaustion, and, just like with humans, they can die from it.
heat tolerant