Cats should be spayed even when indoor cats as having call after call is not healthy for a cat - it can often lead to a very serious life threatening condition called pyometra where the womb becomes filled with pus - as cats aren't like humans and don't shed the lining of the womb in a period like manner. The most obvious symptom of open pyometra is a discharge of pus from the vulva in a Female that has recently been in heat. However, symptoms of closed pyometra are less obvious. Symptoms of both types include vomiting, loss of appetite, depression, and increased drinking and urinating. Closed pyometra is a more serious condition than open pyometra not only because there is no outlet for the infection but also because a diagnosis of closed pyometra can easily be missed due to its insidious nature.

If she mated she is most likely to be pregnant.

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