Thank you for your Book Match Request. I have not read Gooseberry Park myself, but I can recommend some fantasy and dog titles you might enjoy.
Because of Winn-Dixie by Kate DiCamillo
Ten-year-old India Opal Buloni describes her first summer in the town of Naomi, Florida, and all the good things that happen to her because of her big ugly dog Winn-Dixie.
Chuck and Danielle by Peter Dickinson
Danielle's pet whippet, Chuck, is terrified of absolutely everything, but Danielle is sure that Chuck is going to save the universe one day.