Fair warning: There is a lot of human and canine squeaking in this video.

Duffy is a rescue dog with a lot of health problems. Owner Benjamin May writes on YouTube that Duffy has diabetes and developed blindness as a result. Once Duffy's diabetes was brought under control with the help of medication, Duffy's blindness could be reversed with surgery. This is Duffy post-surgery seeing May and his parents for the first time in a long time. 

Now Duffy's facing a new health issue: his tail may come off from wagging so hard. 

Sources: Uproxx