@emilia May we know just why you have decided to spay her now ?
Unless spaying her is going to substantially improve her quality of life, I would advise against it.
Service Veterinary Clinics - Spaying and Neutering
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As a common rule, citizens go to a veterinary clinic to vaccinate their pets, prove for pathological, daily checkups, poor health and sickness that drop within ordinary clinical cases.
https://medium.com/@paullopez03/common-misconceptions-regarding-spaying-and-neutering-7cd2312f0596#.8qjtx9544
