Not so hard to believe
I owned an English Mastiff that weighted 235 pounds.
Woof Man was born here on our property and went on to become a Breed Champion.
To give you an idea on how big that dog was I could make a fist and put it in his mouth past his back teeth!
Woof Man was never fat/over weight.
Along with his mother and a real B**** of a Cow Dog we never had a Mountain Lion problem.
While hunting elk last year in Wyoming there were wolves nearby. I will never hunt that area again, because they are just to scary. Bears, black or grizz, I have no problem with them at all, even when coming across tracks and scat. If you run into a pack of wolves you are in big trouble and your dogs a dead, 235 pound Mastiff or not.
SSS!