Não, nem para todos os animais você pode usar pack
-a group of wild animals that hunt together, or a group of dogs trained to hunt together
a wolf pack; a pack of dogs; a pack of coyotes( coiotes); a pack of mules(mulas); a pack of stoats(Arminho); a pack of weasels( animais da familia das doninhas); a pack of grouse( tetraz ou Galo-montês)- um tipo de galinha do hemisfério norte
-a group of the same type of people, especially a group who you do not approve of
: A pack of reporters were waiting outside.
-pack of cards
: a complete set of playing cards(deck)
-pack of lies
: (informal) something you are told that is completely untrue:
Don't believe what it says in the paper - it's a pack of lies.
Veja a lista de coletivos:http://en.wikipedia.org/wiki/List_of_co ... in_English