Animals can't deny their base instincts. Simplicity itself.
1. Marisa
2. Mister Food
?. Poo Poo
...
? TrainingEven with low intelligence, they could remember training from their owner to a certain level. But as soon as they are given a couple, they will quickly go against the order to "not do refreshing".
The reason is because although they remember, their priority changes.
When getting them partner, it's best to let them live separated by glass while teaching them before letting them be with each others.