My dogs act jealous of each other especially when one is getting petting and the other isn't. If Emmett is in the living room being petted by my husband and angel is in the kitchen and see Emmett getting attention, she will run over there and jump on Emmett's head basically separating my husbands hand from Emmett. This usually results in a play session between Emmett and Angel. We are working with Angel on not doing this. Angel does not do this with me though so its a bit harder to work on since Hubby thinks it funny.
Emmett will run over and nose his way in to get petted if Angel is getting petted but he isnt near as brazen about it as Angel. In our house, only the cat is allowed on the furniture. Just the way we are. The dogs have cushy fluffy huge beds to lay on and they use them daily.