Hello, I have a baby chin who at 12 weeks of age was squished by my son, and suffered a collapsed lung with no broken bones. I found no info on the subject. I am posting what we did and what I think we could of done better in hopes that we can help someone else save their chin like we did. When it happened Honey ran a few feet, rolled on her back and passed out. My son picked her up, she was gasping for breath. with in a couple of minuets she regained consciousness and was acting normal except for her rapid breathing. The Vet x-ray ed her and did a thoracocentsis (removed the air) we asked her to live, gave lots of kisses and started praying. Our Vet took her home with her. We brought her home the next day as she was too stressed at the Vets. She did well the rest of that day. the 3rd day she had to have the air removed again. She was put on antibiotics, at home she quit eating and drinking, we made a broth out of ground pellets,hay and glucose water and were unable to get enough into her. I went in search of oxbow critical care, started her on it and slowly got her eating and drinking again. We got the clean bill of health today, it took 2 weeks of intense care. I think we should of gotten her on antibiotics immediately and had C.C. on hand. I also would have suggested to the Vet to send pain med. to the pharmacy to get cut down to the correct dose as we had none. I hope no one has to go through this but if you do I hope this helps and remember the main thing is getting to the Vet right away.