Should the security deposit cover pet deposit?

[Ping W.]

I am trying to understand why we need to collect pet deposit. If the pet made any damage, we can deduct it from security deposit, right? It makes more sense to me to collect non refundable pet fee or pet rent, but I am new, so I would like to hear what I missed from the experts here. I am particularly interested to hear from the experts in SC, how do you charge for pet and how much for each pet?

Thank you