Maybe. I have not found that smells deter my chickens from entering an area, however fellow chicken keepers have reported that some chickens seem to be deterred by strong smells like herbs, citrus, chilli and black pepper. It depends on each flock, and even each individual chicken as some have stronger tolerances and disinclinations than others. You can try planting the herbs such as catnip, chives, marigold and lavender as a border around the patio, sprinkling black pepper and/or chilli powder, or spraying water infused with essential oils around the area.