Also, both "essuyer" and "s'essuyer" are accepted, which one is most appropriate for this situation?
You would either say "essuyer ses pattes" or "s'essuyer les pattes". Both are fine and equally appropriate. Note the difference in determinants "ses" and "les".
"Sa chienne" is now accepted.
why not "sait comment s'essayer"
One of the meanings of savoir is to "know how to" do something so you follow savoir with another infinitive without any intervening words.
"essayer" means "to try", "essuyer" means "to wipe"
why is pieds incorrect?
A leg or a foot of an animal is called "une patte", not "un pied".
Unacceptable. The question says feet, not paws, and the hints give feet as a choice. I hate this.
"Pieds" is for human feet and furniture legs mostly. In French animals have "pattes" instead. The hints aren't aware of the context.
I thought that I had learned that "savoir" was to know a fact, and "comprendre" meant to understand about something. Why is "comprendre" not used here?
"Savoir" can also mean to know what to do or how to do something. A dog will know how to wipe its feet, but it doesn't have to understand why he's doing it.
i wrote "ses pattes"... wrong, they want "ses pattes".. i write "les pattes" ..wrong, they want "ses pattes"... is it me???
Provide your full answer here so we can help you. There's a difference between "s'essuyer les pattes" and "essuyer ses pattes", as I noted in a post above.
In case anyone else made my mistake: rug = tapis, and carpet = moquette.