Viv is a vet and always has a lot to do, beacause there are lots of pets to help! Also, find out who the top dog is and visit your furry friends at the park. Written by Katie Dale, this educational Early Reader book is book band Red (aimed at 4-5 years, Reception grade). The colour grading system is recognised by the Institute of Education which reflects the reading difficulty. The book content, language style, phonics and layout are taken into account to determine this.