Whenever animals have been quarantined as herein provided, the commissioner, within a reasonable time, shall cause a physical examination of such animals to be made. If, on such physical examination, he deems it necessary, he may apply the tuberculin or any other approved test. He shall not, when he suspects bovine tuberculosis, take any action based upon such physical examination except in advanced cases unless the tuberculin or other approved test is applied and such test confirms the result of the physical examination. If any animal is found to have bovine tuberculosis, he may cause a test to be made of the entire herd in which such animal was found or of any animal which may have been exposed to said disease. If the disease suspected is one which science has demonstrated can be controlled in susceptible animals by the proper vaccination of said animals, the commissioner or his agent may order any and all susceptible animals vaccinated or treated as he may deem advisable.