Cocker spaniels are actually quite known to pee when exicited and I don't think they outgrow it but I'm not exactly sure.
This website has some cocker spaniel info on it if you're interested.
http://www.angelfire.com/ma4/mypups/breed.html
About a few points above the first picture it says...
Peeing everywhere- especially when excited or scared- keep them out of carpeted rooms!
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