questions: query regarding  a cross bred heifer  
 answers: told him to  observe the animal for next sign of oestrous ,after 18-21 day of 1 st oestrous  the animal should be kept on close observation / inseminate the cow after 16-18 hours  when symptoms are prominent . prior to that anthalmintic , liver tonic / injection  including calcium supplement should be given depending upon the type of management