New to hosting.... How much should pet fees be?

[Maria15497]

I've had some great guests who come in with pets.  At present time, I am not charging any extra amount for their pets staying but I have heard other guests do include an extra charge.  I do have to do little bit of extra cleaning but I have no idea how much I should charge for pets staying here with their owners.  Suggestions greatly appreciated.

[Carissa66]

I would also like some advice on this please x

[Amanda660]

I charge £10 per pooch  per night and bill  them via The Resolution centre prior to arrival.