I had a 6 month old filly that from all guess got her front right leg over a fence, got stuck, panicked, and basically sawed her leg down to the bone. By the time I saw it, she was dragging her leg and hobbling around. I thought for sure the vet would put her down. Nope...he's real old school and gruff...said she'll be just fine. Gave her tetanus, pain meds, antibiotics, and some wound care stuff. My farrier recommended the underwoods.
I'm an RN and it went against everything nurse wise to not clean it. I would still use the underwoods and clean her wound. My farrier said...look, just trust me and follow the directions. He has never steered me wrong so I agreed. I did look like hell for a long time, but within 6 months everything had healed...completely. Everything grew back, even the hair was the same color and barely any scar. I wish I had before and after pics to show you. You could not even tell she had this massive gaping gash in her leg 6 months before. The underwoods is some a may zing stuff!! I say stick with it as long as she isn't showing any signs/symptoms of infection, and it sounds like your vet agrees with your current treatment plan.
I'm sending healing vibes your way!!
Yesterday is history, tomorrow is a mystery, and today is a gift-that's why it's called the present.