LOL...let's do some duck math. First, all travelers need 7 days worth, just in case the journey takes longer than expected.
1 human, 13 ducks, 4 geese, 4 dogs, 4 rabbits & 40 or so ducklings
full grown critters consume .75 pounds per day so 26 x 7 x .75 is 136.50 pounds plus 1 ounce per day per duckling 17.5 pounds
Let's order 180 pounds to call it safe.
Wahahaha! Now that, that's duck math!