

So context: I had a foster kitten who I was planning on adopting once she was of weight to be spayed. The whole litter was a bit malnourished, so even though they were 7 weeks old, they were the size of 6 week old kittens. From what I know, the kitten has to be at least around 880 grams to be neutered/spayed.
The kitten that I was planning on adopting was showing symptoms of URI likely from feline herpes and wasn’t gaining enough weight. She was around 680g last time I weighed her even though her brothers gained a lot of weight under my care and were around 760 g. But two days ago, I had to return them so that they could be transferred to a larger local rescue. I contacted the new rescue about my plans to adopt and they let me know that the vet tech took a look at my kitten and that she is getting meds for her URI. She looked pretty unwell in the picture, which broke my heart.
Then today, the rescue just reached out to me saying that my kitten is actually ready to be spayed and that I could come pick her up tomorrow for adoption. I mean, I told them that I would come pick her up ASAP, but it seems awfully suspicious to me that she was able to gain 200 g in 2.5 days, especially when she is sick. They initially said that they expected the kittens to be in foster care for 2-3 weeks. Does this seem normal? I’m wondering if they accidentally got her mixed up with her sibling who looks just like her or if they are rushing to get her adopted out since she’s sick.
First picture is before she got sick and the second picture is what the rescue sent to me yesterday.