If you are worried about your cat getting pregnant, once she is spayed the risk is zero - her uterus and ovaries have been removed so she physically cannot generate eggs to be fertilized nor carry a fetus to term.
If you are worried about her running off chasing after prey or something interesting, if the area is enclosed there shouldn't be a problem. I will warn you that I have an active 2.5 year old cat and she can get into and out of places that I would have sworn she couldn't access or escape. Nothing is perfect as far as enclosing an exploring cat except a steel cage, and even that is suspect with some cats.
The primary concern with taking an indoor cat and letting it wander around outside is that in the outdoors your cat is exposed to various diseases such as rabies, Feline Leukemia Virus (FeLV), Feline Immunodeficiency Virus (FIV), calicivirus (upper respiratory infections), etc. Some of these can be vaccinated against, but some cannot.
Another option to letting your indoor cat explore the great outdoors is to use a harness and leash - these are sold at most pet stores and are designed for cats. Unlike a dog, you can't assume a simple collar will hold around a cat - you do need a harness that fits around the shoulder and rib cage and has straps that run between the front legs. I bought one of these for US$10-15, and my cat loves it. I supervise her carefully so she doesn't go running off after birds or squirrels, keep her out of the street and limit her exposure to diseases without keeping her locked up inside. It is also a very nice excuse to be outside in the sun for a while, and if you are in a residential neighborhood it can help you meet the neighbors.
no, they dont
No! Call the vet!
Get it spayed. Spaying a dog means removing its eggs.
The incision may be infected. See your vet.
Estrus is the time in a female cats reproductive cycle which the female cat is receptive to the male cat. According to the question posted the cat had been spayed. If the cat has really been spayed it cannot come into estrus. If it has not actually been spayed and you just think it has, then it could come into estrus, but this is not dangerous (except she may get pregnant). Either way she will not die, or at least not of that!
The female should be spayed (fixed) at about 6 months. Some believe that she should have a litter before being spayed, but the only thing that does is add more unwanted dogs to the dog pound.
they shouldnt, thats a problem, talk to your vet.. thats not normal..
Female dogs are not less likely to have health problems if they have at least one litter of puppies before being spayed. That is a common myth, but it is untrue. Spaying actually helps to prevent some health issues.
Females are spayed Males are neutered
She will no longer have a period because when she gets spayed all the vet is doing is taking out her reproductive organs
No.
No