To quell concerns, Flaherty gave an interview to The Globe and Mail, explaining that he has a rare skin disease (called bullous pemphigoid) that requires strong steroid treatment. (canadianbusiness.com)
Affected dogs present with a bilateral, nonrhegmatogenous, serous, bullous retinal detachment which may involve all or most of the fundus. (eyespecialistsforanimals.com)
There is also a condition called canine bullous pemphigold which is seen in Doberman Pinschers and a few other breeds. (dog-health-guide.org)