Is the Zoo getting rich from selling the animals poo? After overhearing that zoo poo is ‘valuable', self-obsessed gorilla Jürgen is convinced the zoo's poo is being sold behind his back.To stop anyone cashing in, he calls a poo strike - no one is allowed to poo in the zoo. But as time passes it becomes more and more difficult for the animals to not give into the urge, and when a mystery poo is discovered the ‘No Poo Zoo' is gripped by a puzzling case of ‘Poodunnit'.

A mystery illness leaves Topaz the kangaroo (pictured) without a hop - and the vets scratching their heads.When Topaz is taken for treatment, rumours begin to spread around the Zoo that it could be ‘Uncle Nigel's Hoppitystophop' - a horrible condition that causes kangaroos to lose their ability top hop.Jealous of all the attention on Topaz, hapless gorilla and self-appointed leader of the zoo Jürgen conjures up an illness in need of treatment of his own. Diagnosed by fellow gorilla Geoffrey as "attention-seeker-itis" will he and Topaz ever recover?

Neil the wimpy lion is under pressure from his overbearing mother-in-law to ‘man up' and ‘get buff' - like previous alpha-male lion Maximus.To prove he too can be a powerful dominant male, Neil seeks out ways to improve his physique and, impressed by Jurgen's muscles, he decides to copy the gorilla and go ‘vegetarian'.The new veggie diet however, doesn't go down too well for carnivore Neil – he misses his meat with a ‘side order of meat' and despite his best efforts to ‘kill some carrots' his mother-in-law still isn't impressed. Poor Neil.