You can use Panacur Paste in dogs of any age so if you are happy enough with that, you can carry on using it. Or if you wish, you could try her on Drontal or Milbemax - both are top quality multi wormers but they may not suit Jess. What suits one dog may not suit another so its very much trial and error really. The panacur favourites will have been in her system long enough to have some effect so unless you suspect her of having worms, I wouldn't give her another treatment straight away.