I agree that this is wrong and that it shouldnt happen, but i also think that trying to get these places shut down is a bit of a dream although yes it would be great!
However if you are going to start a petition i think it would be better to take baby steps and maybe petition for laws on better living conditions! Its difficult and people do need to be educated. I had no idea about P@H getting rats that came from places like this and i dont think they know what kind of conditions the rats come from (im saying this after a convo i had with an employee of P@H). I also have to say that i dont think all of these farms are going to be this awful and that this is an extreme. I do think that this is wrong and that the animals need better living conditions.

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8 Ratties - Winnie, Nelly, Doola, Spot, Crumble, Sherbert, Fizz and Dolly. R.I.P Possum, Dini and Custard.
2 Rabbits - Alfie and Floss
Syrian Hamster - Toffee R.I.P, Bubbles R.I.P