Wow- I've been following this thread and just had to share a story.  First let me join with the others who have complimented you on your love and dedication to your ducks.  
Years ago, my sister-in-law raised chickens, she saw a mixture of baby ducks at the feed store and added them to the mix.   I was the designated barnyard helper, trimming wings, feeding & watering when she couldn't, etc.  The ducks were Pekins & Mallards.  When they were full grown, somehow one of the Mallards injured his foot and it healed incorrectly which left him with a limp.  We kept him separated with his own pool but one day the Pekins got in his pen and really worked him over.  We immediately took him out, built another pen on the other side of the barn away from everyone and took to mothering him to death, which promptly made him into a Mama's boy.  Our massive garden was on one end of the barn and he pretty much lived in that garden each summer, which earned him the name of GD (Garden Duck).  We had very little trouble with tomato worms and potato bugs when GD was on duty and we figured he earned the right to eat some of the greenery too.  We faithfully walked him down to the big pool each night so he could take his swim and of course he strutted past the Pekins like any spoiled child would do.  He also had his own pool but it was too small to do anything other than get wet.  
My sister called me late one night and said that something was in GD's pen, she was deathly afraid of birds and wouldn't go in to help him, I went flying out to the barnyard and walked into his pen, scooped him up and then realized I had a big old possum to get out of the pen.  I love all animals, but I HATE possums.  I had a full sized Mallard tucked under one arm and a shovel in my other hand and possum on the other end of the shovel.  It was a long tense battle but I ended up getting the Possum out of the pen and then fixed the place where he had gotten through.  The whole time under my arm, GD was giving me hell for not letting him see the action. 
GD lived for many, many years, he kept us entertained, I think he loved us in return, the way he would cock his head and look at us whenever we called his name was worth all the special care he required.  He's been gone for years, as are the chickens & ducks but we still remember him fondly whenever we start a new garden. 
I wish you all the success in the world with Pudge, thanks for letting me walk down memory lane this morning remembering the best duck in the world, or at least in the state of Indiana, GD.