Being omniscient, Jesus knew even the smallest details. He foreknew where to find the animals, gave specific instructions on what the disciples were to look for: a mother donkey and her colt, and predicted what the owner would say and do (MT 21:3).
Jesus spoke of the donkeys with an air of authority that, if He were not "the Lord", would be presumptuous. "Lord" designated Him as being God. He had the right to claim universal proprietorship over all things. Therefore, He commanded.
Does Jesus have our all? Are we giving Him the first 10% of our earnings to prove all our money is His, are we giving Him one day each week to signify every day is His. It's hard to claim He has our all when we reluctantly give Him a part.