The mystery of the secret laboratory. Book 7. Ellis T.

A new exciting investigation of Samantha Wolf! What could be better than a dog? Sam always dreamed of a four -legged friend... and - incredible luck!? She and Ellie were offered to be volunteers in an animal shelter. The girls were happy to respond, because this, besides, is the first real job! But suddenly their wards begin to hurt a lot. Sam and Ellie are undertaking to find out what could have caused a sudden ailment and go on the trail... of a secret laboratory!? Laboratory conduct illegal tests of drugs on dogs! Friends decide at all costs to bring false scientists to clean water and save animals.