Here is an example of a badly damaged berber type carpet. Before and after pictures will show you the expected results from my work. Berber type carpet could be very difficult to repair and the reason is it’s being flat and cross cuts always makes it visible.
That is why you might see some scar marks on the side of the carpet. That is very normal because of the berber. I try to minimize this scar mark, by carefully cutting and seaming it together.
dog damaged carpet 
dog damaged carpet repaired