My dog has an open sore after grooming. Does it need a vet visit?

Thanks for using Petco Pet Education Center, formerly Petcoach! I am afraid that this is an open wound and will require further local therapy with debridement, cleaning, stitches, antibiotics and pain control medications. I recommend that you have Coco evaluated by a veterinarian as soon as possible for further assessment and treatment as these wounds are painful and can get infected easily. Good luck!