You work with other businesses on a daily basis—referring hospitals, vendors, neighboring shops and companies—and those relationships can be easily highlighted on Facebook to help you both.
The Brand Collabs tab on Facebook allows you highlight who you work with. Some examples would be when you participate in a local event with other businesses, equipment vendors such as Idexx or Innovet if you are launching a new service, and food/medication suppliers like Royal Canin or Bravecto for promotions.
To add these partnering businesses to your page, simply click Settings > Monetization > Brand Collabs and add away!