Given that people drench their yards with herbicides, pesticides, and petrochemical fertilizers - and the put their dogs out to walk in it, breathe it, and lick it off their feet, I wouldnt doubt it.
I doubt it.
I'll bet the incidence of cancer in dogs was much lower back before selective breeding concentrated genetic tendencies.
OK, so if this is true, which of these elements caused the cancer? And, how do you know it was Roundup? For that matter, how do you know it wasn't the Chinese dog food?