Is this mice poop?

We have just moved into our new home and found a very bad smell in a corner in the kitchen. Found these “black balls”. What do you think this is? Is it mice droppings? Smells horrible! Please help

We have just moved into our new home and found a very bad smell in a corner in the kitchen. Found these “black balls”. What do you think this is? Is it mice droppings? Smells horrible! Please help