I know this is an older post but if you get tagged in it and for future reference read ......human baby foods contain many more sugars than baby chicks need and this would be causing a diarrhea effect , chicken crumbles provide the basics for healthy growth ,,,I am presuming that this little one is amongst your first on the land you live ?..as such cocidiosis is not a concern,in a breeders situation it is, as the coccidia oocylists (eggs)_..can lay dormant for around 2 years in the soil cockroaches and wild bird fecal matter can also carry these but it is a minor concern ,I would reduce wet feeds such as lettuce cabbage ,carrots etc and put the bird on a more grain like diet and give pro-biotics to reduce coccidiosis concerns or put the bird on medicated feed