Hi, We noticed today that one of our ducks (welsh harlequin) has a limp. We caught her and, noticed cauliflower-like growths on the "heels" of both feet, one worse than the other, and also on the tips of her long toe. The limping leg had a mark halfway u on of the outer toes. We did some inconclusive online research, gave her an epsom salt foot bath, applied a little lavender oil, gave her some feed with nutritional yeast mixed in (not something we've been doing regularly)and let her back out with the flock. I don't know that it's bumble foot b/c the spots were cauliflower/wart looking and not smooth with an infected looking spot. Could be biotin deficiency? any thoughts?