I think a vet visit is definitely in order. Whatever it is it doesn't sound good.
When both cats are back in the house you might keep them separated for a bit and exchange smells with a towel or a blanket. You can also try gently wiping them both with baby powder and/or putting a dab of vanilla under both their chins and at the base of the tails so they smell the same.
Good luck and keep us posted.
Mum to Ziggy (6) and Zuzu (5), Zoey (8) and Raggzy (3) Keena (2)...my own little Heaven!
Ginger and Hobo at the Bridge (Valentine's Day 2011) but NEVER forgotten <3...
"I have sent you on a journey to a land free from pain, not because
I did not love you, but because I loved you too much to force
you to stay" ♥ ♥
We do not have to wait for Heaven, to be surrounded by hope, love, and joyfulness.
It is here on earth and has four legs!