"My bird, Lady, loves the medium sized perch. Since she's skeptical of anything new in her cage, and it's been unusually colder here this winter & I wanted her to use it right away, I placed it between 2 of her other fav perches, and within 20mins, she was warmin' her toesies by sitting on the heated perch. My strategy for her to be able to feel the heat first worked! She sits on it all the time in the evenings. I've now plugged it into a timer, so it comes on in the evening/off in the morning. So far, it's working out great for us..."