Just roll your eyes, and say< "seriously? I raise/have ducks, they have toenails...duh, don't  live in a fluffy girl bubble..." I am a grandmother...but , it  just sounds like naive people with limited information. ....If you want to  prove it , take a closeup of your ducks feet and  toes ... I bruise easy, just little bumps, all my life, I always have half a dozen on me, as a  child I remember them  saying "how did you get all those brusies on your shins...?"duh...."I  don't know, playing" (this was 50-60's before the  cutting fad). My mother also  brusied easy, my daughter and  one son does too. One  day I was at  the  dr. and  he  said ," you have a bruise"....I  burst out laughing.... "no my husband doesn't beat me, I am like, half hemophiliac ...if  I  don't have a  half dozen  bruises on me ,it's unusual., been this  way all my life.... He  then looked at my skin and  said, "oh, you are missing a fat layer under your skin..."(you can easily see my veins and arteries). Which may also be why heat doesn't  bother me and  I freeze before anyone else...
    I have gotten scratches from working with raspberries, fencing, my ducks and  geese, cutting  privetts and  brush.....if  anyone says anything , I  just say ...."I have a farm, animals and  I work outside a lot"