Decided against naming the one kitten Tweedledum- I don’t wish to put that type of dum label on anyone especially this kitten. According to Dr. Vicki both kittens are about 5 weeks old, pretty depleted, suffering from URI and malnutrition/dehydration. Plans include taking them in tomorrow to the clinic to be tested- upgrading their food from baby food to pureed kitten food mixed with formula. Her concern on the calico’s deformity lies in the direction of future issues with pooping. The pelvis is extremely narrow, but she could not feel any stool in the system so somehow this little one is coping.
One of my rescue-group’s cats had an injury to his back, and has trouble controlling his waste management. He walks funny, but is still active and cheerful. He will always be a foster-cat, though his foster-home is a good one. At least your calico kitten will be taken care of for as long as she needs it.