today the norberg zookeepers shaving the polar bear it's for will be analyzed to gauge its stress levels all zoos that have what's called protective contact with their animals train the creatures for medical diagnostic purposes here the testing is particularly painstaking. i'm going to keep is do this job out of love interest and enthusiasm for the animals. we're more than happy to help if scientists are able to prove the animals are healthy and well that this is a system and isn't just based on what we feel. it's hard not to treat the animals like humans. mentioned if research is come and say we've developed parameters that can help us to gauge with the animals are stressed or ill and then we're glad to help with the training routine to it's fun. this is the 1st collect animal excrement as well as for laboratory testing it indicates how stressed the polar bear was a day earlier. so all of just on the hind has developed a special procedure to find out how the polar bears and this is our fairing. over a period of 3 years she measured the levels of the stress hormone cortisol a metabolic p