Kittens are a week old. We lost the runt of the litter, the one looking towards the camera in this pictures. She stopped nursing yesterday and started breathing hard. We brought her to the emergency vet last night and they didn't seem too concerned, just said she might have pneumonia. They gave her antibiotics and we asked about a feeding catheter again and they said not to worry unless she lost weight but antibiotics would take 2-3 days to work and try to bottle feed every two hours. 8 hours later she went from 7 oz to 6.4 so we brought her back in and they said she looked like she was deing and wasn't much to do. We asked again for a feeding tube which they finally gave us (and we now have on hand in case we get another fading kitten). We gave her feedings every two hours today and set her up in an incubator but her breathing got worse. When she struggled with her last breaths I gave her kitten cpr. I heard and felt the gurgling in her lungs so it probably was pneumonia. The rest of the kittens are super fat and rolly polly.