Hi Bunny
Seth is right, these frogs are very toxic and should be kept separately. Although not necessarily harmful to humans, the skin secretions are known to have cardiotoxins.
According to the South African Medical Journal, these toxins will usually enter the body through scratches on your hands or touching your mouth, eyes or nose after handling the frog. Symptoms include painful swellings, difficult breathing, headache, faster heart rate and nausea. These usually last about 4 hours. The best course of action is to use plastic gloves when handling and wash hands thoroughly. Keep frogs away from pets. Remember these simple precautions while you enjoy your beautiful frogs.
Petco should inform the public better. I guess if they do, there wouldn't be many frog and toad sales.