There are no known viruses that can be hosted by a tree. There are however parisites and Fungi that can be harmfull to any plant, shrub, or tree. The only example I know of where a tree might harbor a viruse is if a bark beetle was to by chance have the flu.
Bacterial infection and parisites are the two most common risks. Dogs under certain circumstances eat feces for various reasons. In-of-itself, it isn't harmful but the bacteria and parisites that could be in the feces could pose a problem. The most signifcant risk though is the cat litter itself. The clumping cat litter can contain perfumes and deoderizers and chemical agents that can make a dog sick and, given a large enough quantity of cat litter, pose a bowel obstruction risk.
Borax is harmfull if ingested. Natural products can be dangerous.
parisites
harmfull
Some do, for example, lice and fleas.
Alpacas are not harmfull. They are very gentle
If thay arnt than what is?
Yes, they are VERY harmfull to cats. Don't ever let your cat eat one, unless you want it to suffer and die.
its just they where tought like us when we eat
it is harmfull because it can kill people around the world
beetles and ladybug and other parisites like worms