This app was mentioned in 6 comments, with an average of 2.33 upvotes
https://play.google.com/store/apps/details?id=co.tindog.tindog
He should check out this
There is a dating app for dogs. It's called Tindog https://play.google.com/store/apps/details?id=co.tindog.tindog
https://play.google.com/store/apps/details?id=co.tindog.tindog&hl=en
Tindog?