Rashi: This is a K'lal, u'Perat u'Kelal, to teach us that the La'av is confined to a blemish that is similar to those listed - that it is visible and that is permanent.

B?choros, 37a: The word "Kol Mum Ra" is a Ribuy, to include a B'chor whose cartilage of the ear is nicked in the Din of Ba'al-Mum. ¹

Sifri #1: "Kol Mum Ra" comes to incorporate animals with various kinds of boils, ² or which are old, sick and sweaty (whose breath reeks) in the realm of Ba'alei-Mumin. ³

Sifri #2: "Kol Mum Ra" comes to incorporate animals that are born with blemishes in the realm of Ba'alei-Mumin. ⁴