i have already entered 2 dogs how can i enter another online

As far as I know just go on line and enter it as you did the others, you can't add as such but you can enter the dog, when your list of dogs comes up just click the one you are now wishing to enter.

I haven't entered yet so can't check, but it used to be that you couldn't add an extra dog as the show will disappear from the list of shows. However this was changed and there is meant to be a way in which to do it, it's something to do with the top menu I seem to remember, possibly "View my completed UK entries".

Log in
At the top of the show list click view my completed entries
Then you can click edit next to your crufts entry
Add you dog
Pay for the extras
And your done

Only works for adding a yet to be entered dog, any changes to ones already entered you will have to contact fossedata.