i have two male dogs a bullmastiff and a ddb they are both 12 months old,they have both stopped eating they can go three days with nothing then they will eat there breakfast then leave there tea and it all starts again,i feed them aurtarky with a bit of tripe mixed in.i carnt understand it why both are the same it could not be medical could it ?if both are not eating.

I think it would be best if you take your boys to see your local vets, 3 days without eating is quite a long time.  Better to be safe than sorry.

I would cut down to one meal a day. I have a male elkhound who will only eat every 3 days or so and then he picks HOWEVER I have changed him onto natures menu FROZEN working dog diet and he cleans his bowl every day.
Archer