Once in the spring quite a few years ago, my pup was out running through the new spring grass. He was just a pup and the grass was taller than he was. We came in the house and he began sneezing, and this went on for over a week and through two vet visits. I called them headbanger sneezes bc they were so violent he would bang his nose on the floor each time. Plus I kept finding puddles of clear mucus on the floor where he laid.
Finally, I waited till right after a sneezing fit, grabbed a flashlight and looked up his nose. I saw a tiny green dot right in the middle of his right nostril. I grabbed a pair of tweezers and got hold of the thing and began pulling it out very gently. Seven inches later the thing unfurled and I was holding a piece of new spring grass!
There were no teeth marks on it so I figured as he was running around, a piece must have shot up his nose, or he ate it and vomited and that's how it got there. IDK, but he was fine afterwards.
Hope Max is doing better.