On February 1st one of our cats had 2 male kittens and on the 13th our second cat had a litter of 5. Sadly we lost all but one from that litter. She will be a month old soon and is no where close to the size the 2 other kittens were at a month old. While they are growing in size like they should she is not. Mama cats are sisters who have always been extremely close and both litters have the same dad. Both mom and dad have no health issues and are normal sizes. I don't know if I should be worried about her or not as shesimple been nursing off both mama cats as well as hand feed to make sure she's getting enough, she plays and has been progressing like she normally would she just doesn't seem to be growing like normal.