Hi there. I'm from Orillia. I don't know anything good about breeders, but I do know quite a bit from the perspective of someone who tried to research rat ownership and along the road of actually taking in several rescues, found out many things I'd wished I'd known beforehand. It's great that you're here and doing your best to research rat ownership before delving in. :joy:
So without further adieu, here are some important things you should have in order before adopting.
1) Check local rescues. They often have rats that are already very well trained and bonded to each other, are young and have plenty of life to live, and will make wonderful companions and be forever grateful to you. They know.
2) Spay and neuter, as soon as possible. With female rats, they have about an 80% or higher chance of getting a mammary tumor if they are not spayed very early in life. I did not know this, and all of my females have had tumors now. It's not a death sentence, but it's very likely recurring, and it's about the same price as spaying. Besides, there's other afflictions (such as pyometra, an infection) they can get if they are not spayed. I have had to pay for the tumor removals then spay them as well, so I've spent much much more money in the long run, and cost my rats more down time and discomfort. I will ALWAYS spay right away with any females I get in the future. For males, neutering is important because it reduces any possible aggression or territoriality, and of course allows them to mesh with your rat pack better, including females. You can expect to pay about $250 for a spay, and maybe about $100 for a neuter. This can vary widely from vet to vet, so price that out before you adopt.
3) Find a good vet you can trust. I would go and talk to several local offices that treat rats, and maybe ask them several questions about their procedures. I can help you work up a vet interview question list later if you want. You need to balance cost with getting the best care possible. Just because a vet is more expensive doesn't mean he's better, or if one's cheaper doesn't mean he's worse. You just have to research them, and you can always ask on here too.
4)Lots of cages can be hard to clean and uncomfortable for you and your rats, even tho they look decent from the start. I strongly advocate the critter nation brand. I got mine from ferret.com. As you are beginning and will not have more than maybe 3 or 4 rats, you should get the single level. If you later add more to your family, you can buy the add on unit and it is expandable. These cages are fantastic, easy to clean, healthy and sanitary, spacious, rats love them, they're just all around good stuff. You will pay just a little more than you would for a totally bunk cage, and it is worth every penny. You'll thank yourself later.
5)As rats are highly social and need others of their own species to thrive, you should get a minimum of 2, but I would strongly recommend 3 rats. You and your animals will be much much happier in the long run.
6)As you have other animals and people in your home that may not be rat friendly, be sure you have an area (your bedroom?) prepared to be off limits to other animals. It is easy to have a cat that's really nice, and we think they are safe around our little babies, but all it takes is 2 seconds of a curious cat, dog, or frightened person and you have a possibly mortally injured rat, and that could have been prevented. My rats stay in my bedroom where nothing or no one else can get to them, and the door stays locked. There is a dog downstairs, a big black lab, that is really nice and doesn't mean any harm, I think, but one day I had a rat on my shoulder and he jumped up towards her and snapped his jaws. Had he caught her tail he could have killed her. I screamed at him and ran away, and you better beleive I never let him anywhere near me when there's a rat on me. I generally don't even take them out of the room anymore.
6)Be sure to set aside time every day for bonding, playing, and running around. Some people use kiddie play pens but mine just run around on my bed and desk which is kinda connected to one area. Probably at least one hour dedicated out time is good.
I'm sure there's more stuff but those are some of the things I wish I'd known. I mean, aside from the obvious like getting proper food (oxbow regal rat?) and buying some toys/blankets/hammocks for them. This thread has lots of pix for how to decorate the critter nation (CN), remember, many of these are the double version, you'll probably want the single version for now. Although there is a lot to know about properly caring for rats and it may seem like a lot at first, I have found this to be one of the most rewarding, life-enriching experiences I've had. They're extremely smart and affectionate. They frequently shower me with love and affection, and even when they are not well, they show love to me in the cutest ways, and they know that I'm working my best to help them be happy and healthy. They pick up n things very quickly and come up with the funniest ways to entertain themselves and me too
I am confident that if you continue to put this much into your endeavor to be a rat parent, you will find your life equally as enriched.
Welcome to the forums! There's tons of fellow Ontarians here and more who are very nice and knowledgeable, so have fun getting to know errybody!