updated 10/25/2011 AT 11:50 AM ET
•originally published 10/25/2011 AT 2:00 PM ET
The staff at the Dogs Trust Shrewsbury in Roden, England, knew dogs Lily and Maddison were special – they just couldn’t understand why potential adopters didn’t see it.
“People just kept on walking past their kennel, not interested,” Dogs Trust spokeswoman Hannah Macey tells PEOPLE. “Some people were put off because of the fact that Lily doesn’t have any eyes – it’s a bit shocking to look at.”
A medical condition caused the Great Dane to lose both eyes when she was just 18 months old, and her beloved canine pal, also a Great Dane, has stuck by her ever since. Maddison acts as a guide dog, leading Lily by her leash or by barking so her friend can hear.