Halloween Event Question

[Snares]

How do I get the slime dogs? I've opened two of the little presents boxes, but keep getting this lady:

[sashiyaki]

How do I get the slime dogs? I've opened two of the little presents boxes, but keep getting this lady:

They're from the same box, just gotta keep opening them up or swap them for different ones.

[Camilo Madrigal]

You just keep opening the boxes, it's a 1/4 chance of each dog being the outcome. You seem to have rolled the RNG of getting the same dog twice, which is a unlikely(?) chance.