Hi..I am going to be getting an English Mastiff pup in a few weeks...and i have been thinking (ever since i lost my Polish hen the other day to a predator)..that i would like to have a dog that i can trust in my yard during the daytime with my chickens and also sometimes my goats...could i trust him with them if i train him to be around them safely?..will he chase off any predators?..such as 'coons, fisher cats, foxes, and even coy dogs?..i would have him in my house at night...because my chickens and goats are locked up in barns/coops at night anyways....but..i'd like to have him in my yard with them during the daytime(weather permitting of course)...i know Mastiffs are guard dogs...but are they "livestock" guardians as well?...thanks for any help with this, Wendy