is it REAL leather? Real leather does NOT feel like it's fragile. it's STURDY.
Real leather furniture has a distinct smell to it. Yes the smell will fade over time...but new?? nope. distinct.
Real leather furniture backing has a distinct look - open the seat cushion - via the zipper. If it looks like suede - it's real. If it looks like woven fabric? It's fake.
I have a leather couch set - I have had dogs with sharp nails on it and wrestling on them - no problems....We bought the set in December 2008. Still looks brand new. We were VERY lucky and got ours on sale for less than $4K for the set (half off). How much did you pay for yours?
Was the purchase from a reputable store??
Did they give you any details on the leather - is it rawhide, Naugahyde, etc.?
Can't help you without those questions being answered!
good luck!