My cat gave birth to only one kitten! A month ago on my birthday(she is a small cat) and i noticed the kitten has a deep sunken in spine below the shoulder blades and his ribs have an appearance as if he was squashed. Today I noticed he is very weak, he is very small and sleeps all the time. As for the mother cat I noticed one of her breasts is very enlarged and hard to the touch and her other breasts seem empty and flat and I noticed the kitten only sucks from the enlarged breast. First thing in the morning I'm taking them to the vet. I'm scared I have to euthanize the kitten, does anyone have experience on a similar kitten? Does the mother cat have mastitis? Is the kitten weak because of the cats matitus or could it be the deformity of the poor little guy?