Thank you for your question about Luna, and thank you for the photos - they are very helpful. Luna's testicles are of a normal size for a rabbit. This species has very prominent testicles, and the sparse fur that is present on the surface of the scrotum often makes them look even larger. I cannot appreciate any abnormalities on the surfaces of either testicle with the photos that you have attached either. I hope that answers your question, and thanks for using Petco Pet Education Center, formerly Petcoach!