my cat had kittens and we found her outside with them we think about 3 or 4 days after she had them. There were only 3 kittens. We brought them inside and they have been in for about 4 days. One died last night but the other two seem okay, except one has very swollen eyes. They havent opened their eyes yet, but around the eye area is it very swollen. What can I do to help it? Is it natural? Will it go away or do i take it to the vet?