The present invention is a pet training pad apparatus suitable for excrement training for dichromatic animals. The pet training pad apparatus comprises a pad body and a visually stimulating indicium. The pad body comprises an excretion surface, an absorbent layer, and an impermeable layer. The visually stimulating indicium comprises at least one dichromatic vision detecting element. The absorbent layer is connected between the excretion surface and the impermeable layer. The visually stimulating indicium is connected along the excretion surface, opposite to the impermeable layer. The at least one dichromatic vision detecting element is distributed about the visually stimulating indicium, where the at least one dichromatic vision detecting element is configured to visually attract animals with dichromatic vision.