I look after four ferals in my work place. Two are pretty tame and allow me to touch and even hold them. The other two are frightened of getting too near me. I have never been able to get them into a box or trap (except when they were young and spayed/neutered). Now one of them has some dental/mouth/throat problem. She is obviously hungry, but gagging and dribbling white foam every time she tries to eat. It must really hurt her to eat. I have noticed she is loosing weight. I have tried to approach and catch her but presently its impossible. I could wait for her to get weak enough so that I can grab her, but I would rather get her to a vet as soon as possible. Also she might go off to hide and I won't find her. Can anyone suggest a solution before she starves to death