"There is a spare animatronic called Oswald the dog,he cannot see,but he can hear perfectly though."Night 3 phone call at SpringBubba's Diner.
"We found one,a real one,Oswald the dog,in perfect condition even,he can see but he still mainly relies on his hearing."Night 1 phone call of Oswald's Pizza Club.
Oswald at SpringBubba's is a spare animatronic that cannot see but can hear almost perfectly.
Oswald at SpringBubba's is black,but at his own place he is green and orange,he even gets eyes at his own place,both suit and endoskeleton(although admittedly not as good as those of the other animatronics).