Summary Faik Yildiz's inseparable Chihuahua pack is suffering from contagious diarrhea, presenting island veterinarian Stephanie Petersen with a tricky task. Treatment with antibiotics becomes group therapy. During the examination, Stephanie Petersen comes across another serious finding. Almost the entire gang is overweight. The veterinarian has to put the brakes on the pack's eating. The operation on a 60-kilo dog demands the entire practice team Owner Susanna Rohde came across several ulcers on her Bernese Mountain Dog while cuddling Balou. Marion Link examines the individual lumps in her Starnberg veterinary practice. One of the ulcers is a malignant mast cell tumor. Balou needs to be operated on quickly. The sooner, the greater the chances that the tumor will not spread. The operation on the 60-kilo dog demands the entire practice team. 320 kilometers for budgie Oleg Stephanie Scheid travels a total of 320 kilometers to have her budgie Oleg examined by bird expert Gerd Britsch in Karlsruhe. The male Oleg appears to be turning into a female. This can be recognized by the so-called cere on the beak, which changes color. Gerd Britsch quickly finds out that a tumor on Oleg's testicles is the reason for his testosterone deficiency. An implant, which is inserted under general anesthesia, is intended to bring Oleg's hormones back into balance.

• Documentary