My husband and I found a stray a couple nights ago and have been keeping her isolated from our other cats as much as possible. Yesterday she got out and may have used our other cats litter box, or are their food/drank their water. We took her to the vet today and she tested positive for felv. I'm worried she might have infected our other cats. Our vet said it was a possibility but I'm not sure how possible and if I should be worried. Like is it very lightly or not likely since she one had contact with them that one time? I tried to call my vet back but the clinic is very busy and they are not able to answer.