We have a foster dog who is 8 months old and have seen similar behavior. I think your dog is going through an adjustment phase. I'm sure he has some security issues. He doesn't know for sure yet if his new home is his forever home. He doesn't know your routine and what to expect. When you leave him, he doesn't know if/when you are returning.
We have seen such an improvement with our doodle over the past few days. I'm sure you will see him settle down.
If he continues to be overly excited when you return, you can help by making your entry as non-eventful as possible. Come in quietly, don't fuss over him right away. If he jumps, correct him and hold him so he doesn't try to jump again. Ask him to sit and give him a treat for behaving.
Deb
We have seen such an improvement with our doodle over the past few days. I'm sure you will see him settle down.
If he continues to be overly excited when you return, you can help by making your entry as non-eventful as possible. Come in quietly, don't fuss over him right away. If he jumps, correct him and hold him so he doesn't try to jump again. Ask him to sit and give him a treat for behaving.
Deb