What can be deducted from tenant with pets on move out

[Sam Abe]

My tenant just moved out and the carpet was brand new when they moved in and in 1 year it looks like it is 7 years old. Can I withheld security deposit for the damage as she had 2 pets and looks like the dog chewed in the carpet by the room doors. I only have 500$ pet deposit but the cost to replace carpet is way more what should I do.