Hello I am fostering 6 kittens that are now 6 weeks old. About a week ago one of the kittens seemed sick and was losing weight so I took her back to the animal shelter for them to look at her. She had Coccidia and I am treating all of them for a week now with meds. I have been weighing all of them regularly and she has not gained any weight yet. She weighs about 13.50 ounces and the other ones are well over 21 ounces. She is eating a lot. She never ays and is super mellow just looking around or sleeping in her bed. Any suggestions?