
Hi Emma, yes within reason. Obviously size is an important factor for Guide Dog work, boxers have been used - many years ago, also bullmastiffs & dobermans & loads of others, but the lab & GR's and a cross between the two has proved to be a very good dog to use, & with the breeding programme that is in place, it means we can breed more of what is successful & hopefully produce more good quality stock.
However, we have discovered that there may be other suitable breeds out there & this is why we are trying some (on a very small scale)
Hearing dogs - they use a lot of donated dogs & although I'm no expert on Hearing dogs, I would imagine they could use lots of different types of dog, a healthy dog who is willing to please & eager to learn with a good temperament would be a great start & there are lots of dogs that would fit that criteria.
Dogs for the Disabled, which was set up on the premises of the GDBA breeding Centre a few years ago, (but has since grown & moved on to bigger & better things) use a lot of GDBA rejects, a GD trainee may not be suitable for GD work but potentially could be a good DFD. One dog that springs to mind, didn't make it as a GD & was just not interested in working. Was assessed by DFD & immediately tuned into that type of work & was like a different dog, loved his training & is now a very good DFD helping a disabled person.
:) Edit to add. just seen JG's post & yes dalmations were also used in this country years ago, we have a huge black & white framed photo at the Breeding Centre with lots of different breeds (including a dalmation) all in harness.