Minimum 2nd heat, preferably 3rd or4th.
That depends on her health.
If both the male and female are healthy there should not be much problem in them mating successfully.
As soon as spawning has finished she should be removed. The male will chase the female and kill her otherwise.
Mating should happen in the male rabbit (buck)'s cage although they should be separated after mating has taken place as the female will become irritated by the buck afterwards.
Before the mating period, the male betta will create a bubble nest, where the eggs will reside. Once the female is near, they will usually fight each other before finally mating. Once they finish, the male will take the eggs in his mouth and put them in the nest. If these are pet betta fish, then the female should be removed after an hour or two.
When the female dog is ready for mating, one time is enough.
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It is not normal for a female Betta splendens to die after spawning. In the wild the female would swim away and leave the male to look after the nest and its contents. When bred in a small aquarium that is not possible so the female should be removed before the male kills her.
It is best to wait until the female guinea pig is at least 4-6 months old before breeding to ensure she is fully mature and ready for pregnancy. Breeding too early can lead to health issues for the female and her offspring. Make sure both guinea pigs are healthy and the mating process is supervised by a veterinarian or experienced breeder.
The male should be a few months old before mating and his testicles should have dropped
if what you mean is how long you should wait before mating then you should wait about 2 weeks for the betta fish to mate, keep them in separate tanks but make sure they can still see each other to increase flaring. you should get at least a 1 gallon tank or more, the male should be in the bigger tank because the male should build whats called a bubble nest for the eggs, after 2 weeks you should have the female a bit fatter, almost the size of the male. make sure you have a hiding place for the bettas so they can mate. another is to make sure they are about a month to 2 months old before mating for best results.
no