By and large,
emotions are what we have in common with the other animals;
reason is what sets us apart. In case your personal observation doesn't confirm this, let me know; it is also a
neurological observation.
Obviously, not all animals, let alone species of animals, have the same emotions, but considering that emotions can be located in the brain, and that other animals seem to be wired up much the same way as ourselves as far as emotions are concerned, I feel that concerning the thesis "animals feel emotions the same way as humans do" the burden of proof is on those who deny it.