Which is where "specially trained" comes to play. Dogs are very intelligent and perfectly capable of being trained to do what they need to do. They have been doing so for thousands of years so it's reasonable that they can continue to do so now.

Think about it....There are dogs that are used in hunting of other animals. Along the way, they could get bitten by a poisonous snake, they could get injured or even killed by the animal that's being hunted.

So the possibility of danger to them is understood and accounted for. They have a purpose and are able to accomplish it.