There are a number of other websites that contain useful information on re-homing animals and how to cope with behavioural problems in newly adopted pets.
The Dogs Trust
This long-established dog charity has a number of factsheets on their website.
Battersea Dogs and Cats Home
The charity has some great information including first aid, pet passport, behaviour and responsible ownership.
Feline Advisory Bureau
The Feline Advisory Bureau (FAB) is a charity dedicated to promoting the health and welfare of cats through improved feline knowledge.