I am still waiting for biospy results back from one cat. She has lost over a pound in a month, had diareah and white foamy vomit yesterday. My other cat was acting a little weird yesterday, not eating but I figured it was because the only other cat he has known since he was 2 months old was his sister, and she has never been at the vet overnight. Today though I saw white foamy vomit again, and it was fresh, so I knew it was him. He is having diareahh and had a fever for 104, so I took him to the vet. My cats have been vaccinated every year for rabies and the combo FVCRP vaccine, but not for FIV or Feline Leukemia. I have been taking her of a stray cat that had kittens on my back porch. I have pet the cat and handled the kittens but I always wash my hands. I feel though that my cats might be sick because of this outdoor cat.