Thin leather on City?

Oct 21, 2009
507
1
Europe
I got my first and only Bal last october. Im not a collector but was looking for a stylish quality bag that i could use frequently.
I've been using it quite extensively since i got it and now i have the feeling that the leather at the back of the bag is getting thiner and thiner. Is that normal from just wearing the bag? I feel that if i wear it any longer it will get torn.. Should that happen to a 4/5 month old bag which cost me €1000 ? Do you have any advice on what i could do apart from stop wearing it? Thanks for your help xxx