What is "Holech Al Kapav"?
Rashi: It is animals such as bears, dogs and cats.
Why does the Torah insert here the law of Tum'ah of Chayos that walk on the soles of their feet (and not on hoofs - such as dogs, bears and cats), which it did not mention above (verses 2-7) in the prohibition of eating?
Ramban (24 DH Hinei Lema'alah), Moshav Zekenim: It is not common to eat them, so the Torah did not detail them. They are included in the Klal of what does not have split hooves or does not chew the cud. Chayos are included in 'Behemah'. 1
QUESTIONS ON RASHI
Rashi writes that bears, dogs and cats.are "Holech Al Kapav." I.e. even though they have split hooves, they are Tamei because they walk on the soles of their feet. If so, why does the Torah (verses 5-6) forbid Shafan and Arneves because their hooves are not fully split? They are forbidden because they walk on their soles!