I found this site while searching for info on caring for kittens who are sick. I am fostering a mamma cat who adopted 5 babes when her litter died. Her and the kittens have a bad cold. We lost the smallest kitten during the night. We found him the next morning and one of the siblings laboring to breath. We took him to the vet who put him in an oxygen box, gave him an anti inflamatory, an antibiotic and fluids. We took him home and fashioned an oxygen box. He made it through the night, much to our surprise but still labors to breath. We hope the oxygen buys him time to heal and expell what's clogging his little lungs. Very grateful for this site.