There is limited specific information on scents that porcupines dislike. However, like many wild animals, porcupines will likely be deterred by solid and unfamiliar odours. Natural repellents such as garlic, pepper sprays, or predator urine (like coyote urine) are sometimes used to prevent various wildlife, and these might also be effective with porcupines. It’s important to note that using such deterrents should be done responsibly and with consideration for the animals’ and the environment’s safety and well-being.