I figure the mfr would nix off-label use, so I'm asking here. I have 3 rescue hens; one has little black spots on her feet that remind me of mildew. I was thinking of spritzing all three of them with Vetericyn to be safe -- they haven't been well cared-for. I did add Nutri-drench to their water. Also, they were forced to eat their own eggs for food; will they get over this now that I'm caring for them?