Male
Male rabbits who aren't neutered can't have other animal companions because they will either fight them or, in the case of unspayed female rabbits, mate with them.
No, and a female rabbit is spayed.
A neutered rabbit looks like a normal rabbit, but without the ability to reproduce. To tell if a rabbit has been neutered, you can look for a small incision scar on the rabbit's abdomen or ask a veterinarian for confirmation.
Why do you want to breed your rabbit? There are tens of thousands of unwanted rabbits in rescue centres desperately looking for good homes. There are not enough good homes for these poor unwanted rabbits as it is. Please don't add to this problem by breeding unnecessarily. Your female rabbit should be neutered. Not only to prevent her becoming pregnant and bringing more rabbits into a world but also for her health. 80% of female rabbits get womb cancer by 6 years of age if they are not neutered. If she is neutered she can live with the male rabbit for company. Rabbits are happier when they have company. If you care for your rabbit, please be a responsible owner and don't breed her.
If your rabbit has glaucoma it's probably not a show rabbit and all you can and should do is take it to a vet have it spade or neutered.
Although your pet rabbit would "accept" a guinea pig companion, the habit of the rabbit to jump playfully when happy could cause serious internal injury or even death of the guinea pig companion. Source: http://www.petwebsite.com/rabbits/housing_rabbits.htm If you want your rabbit to have a companion, the best choice is always another rabbit - however both rabbits MUST be neutered (or neutered and spayed if the companion is a female rabbit) to avoid fighting or breeding, along with saving you the other troubles that neutering can fix (some types of aggression in both genders, spraying in males and uterine cancer in females - unspayed females who are not bred from have an 80% chance of being diagnosed with uterine cancer by the age of five years). Source: http://www.fuzzy-rabbit.com/vet.htm Also the rabbits should be introduced carefully (if possible take your first rabbit with you to a shelter to let him choose his own companion, as this would be much easier to deal with), first on neutral territory, and ONLY if the introduction goes well on the neutral territory, THEN socialize them in a place that your first rabbit considers his. If this doesn't go well put the rabbit companion in a separate cage, or if the cage is big enough, divide it so that each rabbit takes up half the cage and does not need to cross paths with the other rabbit. Source: http://www.fuzzy-rabbit.com/bonding.htm
Have one of then de-sexed, neutered for males and spayed for feemales. Or keep them apart.
In almost all cases, yes. This is because female rabbits are territorial and most male rabbits fight. In rare cases will and un- neutered/spayed rabbit live with another rabbit.
To determine if a rabbit is neutered, you can look for a small incision scar on the abdomen or scrotum area. Additionally, a neutered rabbit may exhibit behaviors such as reduced aggression and marking, and may have a more relaxed demeanor. It is recommended to consult a veterinarian for confirmation.
It depends if the female is going through her 'menstrual' cycle at the time of mating. Also if either the male or female is spayed it is unlikely the female is pregnant. A female rabbit is basically 'in season' all the time. As far as a menstrual cycle goes, I don't know where you got that term. It is not a rabbit term. Sometimes breeding with the moon is your best bet for large litters.
The male rabbit should never be housed with the female rabbit. He should never be introduced to her habitat. To breed she should be taken to his cage and removed after they are done breeding. The male rabbit should NOT be exposed to the kits.
There is no specific name for a castrated male rabbit. BUT!, it just means the male rabbit is nuetered or the female is spayed.