Below are links to several sites or even to specific articles that offer helpful information in many different areas of the rat fancy from breeding and health to environment and behavior. In addition to the links featured here, there is also a wealth of information at the organizations, ratteries, and other links pages that I have provided, so don't forget to look there too. If you would like to suggest a link, please email me with the website address. Being involved and educating yourself on the whole world of rats will only help you appreciate them more, so I hope you can find something new in these links, and share it with others! It is by sharing accurate information that the rat fancy will grow and that growth will be healthy and strong.
Pictures,
cage designs, products, articles, humor, links and tons of information!
Links to all areas of having rats for pets!
Markings and varieties, basic necessities, how to choose rats, interacting and training rats, breeding, common medical problems, FAQ, and lots of pictures!
Rat behavior, biology, senses, systematics, health notes, humor, pictures,
sounds, and lots of enrichment ideas! 
Info
including breeders, health, photos, toys, games, standard descriptions
and more!
UK site with all kinds of information, resources, pictures, and more.
Photos, rescues, adoptions, articles, entertainment, stories, product
reviews, rat anatomy, harnesses, and the biggest yawn gallery ever!
Medical and nursing care, case histories, guidelines and info on medications,
and basic rat care articles! 
Full
database of ratteries, prefixes, and clubs...the most complete of it's
kind!
Names, crafts, enrichment, cages, rat reputation and folklore, memorials,
links, downloads, book reviews, photos, stories, facts, ownership essentials
and guide, and lots of rat facts!