I see her! Is she looking for her lost black halo? This works well for the challenge in mono, she is well hidden amongst the foliage, I love that here eye is illuminated by the sun and looking towards you, it works well. You have a lot of blown highlights from the intense sun but eliminating those may have also eliminated poor Sofie, and we don't want that do we! I think a better solution would have been to go back to portrait format and crop the path out completely, I think this would have improved your score too.
After some effort searching, finally I saw the dog. I also saw the light, the dappling of which enables the excellent camouflage, which is also made possible by cunningly going black and white. The square format works well. Altogether, a winning, handsome image.
One of three personal favorites in this challenge.