Dog running service?

Since walking is the category and most folks rarely read the full profile, you may get more walking requests than running requests. Good luck

Technically, services have to be searched and booked through one of the defined categories, so you'd list it under walking and on your profile explain it's for running (not walking).

That seems like an add-on service for some clients. I could see owners of bigger dogs using that more. You'd have to offer walking , but include running in your profile. Not everyone will read your profile, so maybe offer to clients who seem to have the type of dog that will benefit when they contact you initially.