My cat has been diagnosed as diabetic for 3 weeks. Her first BG was over 600 at the vet, and she was started on 1 unit of vetsulin 2x daily (plus I switched her to canned food). A week later (2 weeks ago) she was tested again at the vet and her BG was 238. She was raised to 1.5 units. Last week she was tested at the vet and BG was 180, so she was kept on the 1.5 unit dose. Today I was finally successful at home testing with a human meter. I tried in the past but couldn't get blood. Right now it is 45 minutes before she is due for insulin, and her BG is 122 on the human meter. Should I give her a whole 1.5 units? I don't want to overdose her! Thanks!