If she goes up to a male and signals him to mate with him which is usually spring time
the best way to be sure is to have your vet check. another way is if your mare is in heat still after being bred. Mare dont usually show unitl month 8 or 9, so you cant tell size wise.
The best way to determine wether or not it is done is when it gets white and "fluffy"
The only reasonable way to "stop" a mare from going into heat, is to keep her with another mare, not a gelding or stallion. having a male around even if they are cut, will encourage the mares cycles to begin. But keeping her away from males may not stop it all together, but it will at least make them less severe.
Wild horses mate in the same way as domestic horses. A mare that is in heat will urinate and present herself to the stallion. The stallion will sniff the urine and then the mare, typically displaying the flehmen response. So long as the mare is receptive the stallion will then mount her and breed with her.
what is the best way to change the sensible heat level of the evaporator
the best way is nothing
During a mare's heat cycle there is a small window of time (about 3 days) when the horse should be bred. If she does not conceive within this time frame she will have another cycle in about 7 to 10 days. These times can vary from horse to horse. The best (and most expensive) way is to have the vet do an ultrasound everyday and he can see the progress the egg is making and when the best time to breed the mare.
There is no way to determine that in a definitive way.
We have no way to determine. You are best equipped to answer.
Radiation
Mare owners who are not directly involved in the breeding process (handling the mare or the stallion during the breeding process), should: 1) Determine the reason for breeding... a. If the foal is to be sold 1. Target market and the best stallion to use for the mare's breeding to optimize foal value and performance ability b. If the mare is being bred for personal use or as a replacement 1. Owner should determine whether their desire to breed is realistic and whether their goal is achievable 2) Determine if the mare can or should be bred. a. Is the mare well bred, conformationally correct, good temperament b. Is the mare breeding sound c. Can the owner afford any emergencies or regular expenses associated with breeding/foaling or issues with the early neonatal foal. d. Is the owner willing to risk the loss of the mare due to a foaling accident (while this may be a rare occurance it can still happen) 3. Owner will be required to provide culture results on the mare to be bred If this question refers to the handling of either a mare or stallion during the actual breeding process the handler needs to ally themselves with someone who can show them the specifics of general handling. Realize that every mare and stallion is different. Handlers must have enough experience to be able to determine the safest way to deal with individual horses. The breeding process can be extremely dangerous, it is imperative that the safety of everyone involved (including the stallion and the mare) is of primary concern.
Only you can determine what is best.