pet dog *****

[gwencarser]

my dog sometimes makes noises of having problems with breathing will start shaking and look quite vacent this will last about 1 or 2 minutes he his 8 years old

[lankeela]

Without wishing to worry you I would get him checked by the vet, as it sounds like some sort of seizure, possibly epilepsy.
It can easily be treated and controlled with tablets.