I am caring for a colony of cats as best I can. The local humane society has not taken one of these cats in 2 years. Some are tame and some are semi-feral. At this point there is an upper respiratory infection going around the colony. I can afford to feed them but not take them to the vet or sterilize them.Is there an antibiotic I can give the ones I can handle ? There eyes are full of a mucus that gets rusty colored and seals their eyes shut.Their nose gets the same type mucus. They take deep breaths through their mouths and exhale forcefully then sneeze. They may repeat this 5-6 times before stopping.I am at a loss . I have found homes for 4 cats in the 2 years and have had 2 makes neutered but I have 3 german shepherds that I am responsible for so my funds are limited for vet care. This is heartbreaking but I am not wealthy. These are pets abandoned and their babies growing up homeless.