Q. My dog went to try and throw up and fell over trying. It seemed like his jaw locked up from trying to vomit and couldn't get the puke out.
DR. MASSIMO ORIOLES, DVM, MRCVS
A. I would definitively recommend to take him to your veterinarian to have him checked and have appropriate treatment. Unsuccessful attempts to vomit may be sign of quite severe gastrointestinal disease, including gastrointestinal dilation and torsion and foreign bodies.
If you like to discuss this problem further I am happy to answer all your question if you require a consultation. Unfortunately more details would be needed to have a clearer idea of what could affect him.