This is Katia on the day that I got her: extremely hungry but friendly, born in a vacant lot to a feral mother in a cat-hating neighbourhood. Somehow, she became tame by herself and someone I know took pity on her and asked me to take her as she was very likely to end up dead. She was around four months old at that time and she had a bad cough and inflamed gums.
With better food, she grew and filled out and became the darling of the place I lived at: she visited all the people who lived there and played with them. The cough persisted though and I put off spaying her until she was about 7 months old.
This is her just before spay day, still tiny at 7 months but full of fun, bouncing on Yoda's head
When spayed, we did X-rays and the vet recommended putting her on antibiotics for a month. She was a fairly good patient and allowed me to give her a pill every day for 30 days and to our relief, her cough cleared up and so did her inflamed gums.
3 years later
She's still a little cat, a very active tree-climber who remains playful and naughty and loves her food so she is a little bit fat. Her personality is such that someone who doesn't even like cats took pity on her as a kitten and gave her to me. Many people who didn't like cats told me that after meeting her, they would also consider getting a cat. I warned them that not all cats are alike and she's unique.