Sure, i will do an approx. for you, 1kg is 2.2lbs,she is 100grms off that,so prob around 2 pounds is a rough estimate.,I have been restricting her intake for about three months, but i would say she lost the weight at least six weeks ago, and has remained the same since then, we knew just by looking at her, and when we picked her up she was so much lighter,now for me to work on those other kitties eh?