Jess did that right up until about a month ago and she will be a year old next month.It was a problem because when she was exited,she didnt only leak a few drops,she would literally pee all over the place
We tried putting a pad by the door and taking her quickly to it when we or anyone else arrived,but she would jump all over the place and the pee would end up everywhere,even on us! We tried alot of different things to stop her doing it,but the one thing that worked was ignoring her when we came in (only for 5 minutes).Its hard,and at first we felt awful...but it worked
She stopped doing this about a month ago now and things are back to normal..we can say hello and shes fine,but we DO have to tell outsiders to ignore her because she will still do it if we get a visitor that she hasnt seen in a while.