[5:4] They consult you concerning what is lawful for them; say, “Lawful for you are all good things, including what trained dogs and falcons catch for you.” You train them according to GOD’s teachings. You may eat what they catch for you, and mention GOD’s name thereupon. You shall observe GOD. GOD is most efficient in reckoning.
This verse shows that dogs are not prohibited that even their saliva touching your food is okay.
Hunting Golden eagle Vs Fox – Human Planet – BBC