I also have experience with cuterebra. I had a male rabbit named Bella who recently passed away, but he had one bum leg. He caught a nail in his pen when he was very small and became paraplegic. Anyhoo, since he wasn’t as mobile as he used to, he also would get them often, especially when I let him outside. This is what I did. 1, clean the affected area with a warm wash cloth with a little bit of soap on it (not too much, you dont even need to see bubbles). Clean it up and push the hair away from the affected area. If the air hole is already open, try not to mess with it. Grab far away from both sides of the hole and push down and up. Essentially not giving that little booger anywhere to go besides out of his hole. After they “pop” out, clean up the area again and lather, and lather and try to get as much neosporin in the hole as possible. By the morning, you will notice a significant difference in the size of the hole and you just keep cleaning the area daily and putting neosporin on it. Sometimes we have to be their Nurses right?