Rye the Labradoodle feels attacked. Immediately after a lemon fell next to him, he ran and made growling sounds. He even put his arms in the air as if he was ready to fight it at any time.
According to studies, dogs have a strong aversion to the smell of citrus. The bitter and sour taste is enough to rile dogs to the point they just might ask humans to get rid of it.
Keeping your dogs away from lemon and other citrus plants and products is important because they can be extremely toxic to dogs.