Pets that are known to be beneficial for therapy for OCD include dogs, cats, and small animals like rabbits or guinea pigs. Animals that provide companionship, emotional support, and routine can help individuals with OCD manage their symptoms effectively. Dogs, in particular, are commonly used as therapy animals for various mental health conditions due to their loyal and loving nature. Therapy animals can provide comfort, reduce stress, and offer a sense of purpose and routine, all of which can be beneficial for individuals with OCD.