I just replied over a guinealynx. I'm just going to copy and paste what I wrote there, in case someone stumbles avross this thread while looking for a hamilton vet in the future.
Just curious, which vet did you take her to that said those things?
I'm in Hamilton, unfortunately there isn't a vet that I have found in the actual city that I would trust with anything too major.
There's 1 vet at Stoney Creek Animal Hospital. She has surgical experience, but I have no idea if she does dentals with any success.
Next closest would be Burloak Animal Hospital in Oakville. I haven't ever been there with my pigs, but it is generally regarded as a good clinic for exotics.
Personally, I take my guinea pigs to Guelph. I use Campus Estates Animal Hospital. I have had successful dentals done on guinea pigs there and the vets are amazing. Dr. Liteplo, Dr. Morin, Dr. Pascos and Dr. Louws have all been really good with my pigs. I always make the drive there.
I believe there is also Windrush Veterinary Services in Brantford. There is an actual exotic vet there. I know a couple people use that vet who are happy there. Skinnypigs1 from youtube uses them.
Alternatively, there is a new small pet rescue based in Hamilton. Serenity Pet Sanctuary. They use a Hamilton/Stoney Creek vet, but I'm not sure which one. You could possibly contact them and ask. I don't know how good of a vet it is though.