well, we just got back from the vet. Because the tumor shrunk SO much in size, she (Dr. Craig) said she really thinks it is more likely a histiocytoma. She said both the MCT and the histiocytoma look very similar under the microscope but b/c it responded so well to the lick granuloma solution she doubted it was a MCT. I also asked about the drops and how I couldn't find any info on the any drops, she said that they make that solution there at the hospital and it's labeled "Lick Granuloma Sol" more for them to identify it for billing and that it consists of 2 different anti inflammatory meds. Long story short, she wants 2 more weeks on the Lick Granuloma solution and then take her off. If it has regrowth then... we will schedule surgery but she said again, she was very pleased with how it looked now