yes your pet gets upsrt when you go to work ....you see pets have no time line so they dont understand why or how long you are gone ...to solve this put some soft tunes on for them ...that way they do not feel alone...

Your pet gets bored and loney when you are gone. Your dog knows your work routine, so when you are about ready to leave, your dog gears up for another day of boredom.

Yes,I do believe that your dog does get upset when he or she is left alone.
The reason I say this is because I have a 5-year old yorkiepoo and when he was younger he would destroy things such as his bed. He would tear all the stuffing out and have it from one room to the other a total mess. So this is why I said yes. I think dogs are very smart and affectionate and most of all very protective of their masters and when you leave them alone I really think this upsets them because they can't protect you and they hate to be alone not knowing if you'll ever come back. So when you do return this is the reason that they're so happy to see you and their all over you. Dogs are very intelligent creatures with alot of love to give. So I hope I've help you with your question.
Bye for now and good luck with man and woman's best friend.