Crits with Animal Companions

[Beswaur Blue Bottle]

Do any of the animal companions have natural attacks with a higher crit threat range and/or a higher crit multiplier?

I was considering using butterfly sting partnering with my animal companion.

[Alzrius]

The thylacine (Bestiary 3) has a bite attack that threatens on a 19-20. Likewise, the iguanodon (Bestiary 3) does triple damage on a critical hit, as does the quetzalcoatlus (Bestiary 6).

Disappointingly, however, a bear doesn't crit in the woods.