|  Add Comment

According to the herpetology division of The Australian Museum: There are now about 216 species of frogs native to Australia. All frogs have many glands in the skin and these glands produced many different compounds which cover the skin. Many of these compounds have evolved to deter a whole range of organisms that might infect the skin of frogs, such as bacteria, fungi and other microbes or that might eat the whole frog, such as snakes. Therefore, it seems likely that these compounds might also be generally toxic to other animals. Cane Toads, Bufo marinus, are known to be deadly to humans.
Here's the link that answers tons of questions http://www.austmus.gov.au/herpetology/faq/frogs.htm#poisonous1

From The University of Florida http://www.wec.ufl.edu/extension/wildlife_info/frogstoads/bufo_marinus.php regarding The Giant Toad (Bufo Marinus) also known as a Marine Toad or a Cane Toad CAUTION: When this non-native species is threatened or handled, it secretes a highly toxic milky substance from its large parotoid glands at the back of its head, behind the ears. This secretion can burn your eyes, may irritate your skin, and can kill cats and dogs if they ingest the secretion.

Symptoms of Giant Toad poisoning in pets include drooling, head-shaking, crying, loss of coordination, and, in more serious cases, convulsions. The dog's (or cat's) gums often turn red, an indicator used by veterinarians to distinguish toad poisoning from epilepsy. For this reason, pet owners should be familiar with their pet's normal gum color. Treatment: If you suspect toad poisoning, get a hose and run water in the side of the dog's/cat's mouth, pointing the animal's head downward so water isn't swallowed. Rub the gums and mouth to remove the toxin. This treatment is usually successful, but call your veterinarian immediately.