Besides increasing physical exercise, what is an effective method for mentally challenging an under-stimulated Springer Spaniel?

Answer

Feeding meals through puzzle toys or snuffle mats

To combat boredom, mental stimulation can be achieved by using puzzle toys or snuffle mats for feeding, or by engaging in challenging training sessions to consume mental energy.

Besides increasing physical exercise, what is an effective method for mentally challenging an under-stimulated Springer Spaniel?
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