Nice toad!
Their fecal matter just looks like fecal matter. If you have your frog in dirt or coco fiber as it should be, you might actually have to dig around to find feces. The only way I know that my female has gone, is when I look in, see the hole she was buried in empty (with a poop in it!) and she has moved to another place in the cage.
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Frogs: 2.3 African Clawed (2.3 albino.) 0.1.1 Albino Horned Frogs, one pre 1999, one this year's. Also: 5.4 ball pythons (one spider, one pastel.) 1.0 Boa Constrictor Imperator. 0.0.3 rat snakes, 0.2 horses (paint mares) 1.0 black cat, 1.0 fiancee'. And a ton of freshwater fish.