Marie25,

Hi. Welcome to Pet Talk.

How old are your two inside kitties? Male? Female?
That might make a difference in how well they might get
alone. As Yorkster has said, the first thing to do if you want
to help the kitty is to bring it to a vet to get a check up.

I wish you luck and want to say thanks for helping this little
guy/gal kitty. You can save a life. Liz & Buddy.