How long can dogs be left?

[MedicalWriter]

I know the RSPCA and others recommend not leaving a dog alone for more than 4 hours. Is this based on research or has it been studied? I thought I read that dogs had no concept of time. So is there a difference from leaving a dog 4 hours or 6 hours?

lem . yup I will x

My 2 are rescues and when we rehomed them the shelters were both of the opinion that they were better off in a home even if we had to work. Some won't rehome at all if the person works even part time

I have left mine just under 6 he was fine it was AT christmas but he has been left for 4 and he is fine,