What is the scientific fact, cat or dog, who is dirtier?
Personally, I think that there can be no problems with cleaning pets, because I have a great device called portable pooper scooper. If you do not know what it is, then I will explain. This is a thing that helps to clean poop and give the opportunity to clean after your pet “traces” that are not always nice to clean. I have been using this thing for a month now, and I believe that it helps me not to touch it and calmly clean it. I advise everyone if you do not want to get your hands dirty
Where’s the science… well, each species has its own concept of cleanliness. Neither a cat or a dog running wild [no owner] will be all that clean, by normal human standards. They need the help of humans to keep themselves squeaky clean and free of internal and external parasites (more so for shaggy dogs than for the typical cat). Dogs are much more attracted to things that humans think are dirty, such as stinking feces and dead, decaying animals which they find in the great outdoors and roll on and play with. You can keep either a pet dog or a pet cat reasonably clean if you are willing make the effort. I think everyone would agree that it takes a good deal more effort, on the average, to have a clean pet dog than to have a clean pet cat.
