I have had really good experiences with campus estates animal hospital in Guelph. Specifically Dr. Morin and Dr. Pascos.
They are the vets that I have used for the past 3 years since I've been at the University of Guelph. My roommate also uses them for her rats.
They are extremely friendly and I have been pleased with their knowledge and skills. I've had a few different issues with my pigs and they have always done a great job treating them. I have a stone pig who is a regular patient there and I had a sow who recently passed who had malocclusion issues and was getting monthly molar trims. They always did a great job with her teeth and recommended the appropriate diagnostics.
They definitely are not the cheapest vet, the prices at the University clinic may be better, but I really love the atmosphere at campus estates and they know my pigs well. Proper exotic animal care is crazy expensive around here anyway!