Pale goose feet

[rawrmonsterbg]

I am raising a Canada goose. He gets grass, grower pellets for water fowl, fruits like watermelon and cherries, lettuce and a bit of a green powder with is just pulverized roots and veggies. He seems fine and rules the house. He's not sluggish and is very active, but his feet are so pale. His beak isn't too bad, just his feet. Instead of the dark gray/black look, his feet are light gray. Help?