Sheldon is one of the best tempered rats I have to date! He is extremely mellow, calm, laid back, cuddly, and easy going! He is more cuddly and calmer than the majority of my standard size males! He will happily cuddle with you for hours! Sheldon gets along with everyone, and never has even the slightest issues with new rats. He does the cutest, most perfect tuck I have ever seen in a rat! He has helped strengthen my burmese and siamese lines, and is the founder of most of the dwarf rats in New England.