Tenant with a dog, willing to pay more

[Nikolai Sazonov]

I live in a 3BR 3BA townhouse and I've set the rental price for master bedroom to be higher than the market to see what happens. The most promising contact I got is an employed, college educated, 30yo female with 35lb non-aggressive dog. 

I have two concerns: 

What complications can be caused by the dog in the near future?

I plan to move out and rent out my bedroom too. How much harder will it be to get a tenant with the dog in the house?

The market price is about $1000, I am charging $1200, plus she is open to pet rent fee which I am planning to be $50, so $1250 total.