I don’t know if they offer a discount, but it wouldn’t hurt to just ask.   Here in the states it really depends on where we’re located it can be just over $100 dollars to over $300 dollars.  But there are some very good low cost rabbit savvy spay and nueter clinics that some members found and were able to get their bunny done for under $100 dollars.  Even as low as $40!!  But you do have to be very careful to make sure they know what they are doing.

Since you are in Ontario, you can try contacting the Ontario Rabbit Education Assocation http://www.ontariorabbits.org/index.html   And see if they have any suggestions or try some other local rabbit rescue to see if they know about any discount offers.

No matter where you go, it’s best to be sure they know what they are doing.  Here’s an article  from the House Rabbit Society that helps you screen the vets. http://www.rabbit.org/faq/sections/vet.html