Hammer also had a dew claw grow back. HOWEVER, my vet said "Oh we can just snip that off when we do his neuter"!! Had I known then what I know now, he'd still have that dew claw!
It wasn't a simple snip. No matter how hard I tried to keep his bandage and e-collar on he still managed to get it off a couple of times. The incision ended up getting infected and the poor guy was on antibiotics and in the e-collar for an additional ten days!! So two weeks of misery for Hammer! I wouldn't advise removing Duke's.
Just keep it trimmed like you would his other nails and it should be fine.
Sharon, Mom to Hammer & Ginger