Mutiple pets but only from the same owner

Hi, 

We are happy to take 2 pets at a time but only from a single owner (so they know each other). We have to constantly turn down requests when we already have a single pet booked in because this is not an option. All you need is a tickbox in the Services that limits multiple pets to a single booking. 

Please add ASAP, it's annoying and bad for our reputation to have to keep turning requests.

Thanks