
It's not a
restriction Sally so a judge may still prefer him if he has other qualities to outshine the others in the ring. Only if all things are equall will it definately come into play. Can you feel his ribs fairly easily if not then you should be maybe reducing his weight for his own good but if you can you are only going to make him skinny which isn't going to impress the judge either.
Cocker coats are mostly stripped with a little bit on trimming on the throat around the feet and under the ears and tail basically. I learned my trimming from a member of the old school who would not have used scissors at the top of the ears and legs as some people do and she learned from the even older school who would not have used scissors at all

I'm not even going to mention the use of clippers as, personally, I would never consider it for showing :) My ideally presented Cocker ends up to the casual eye to have been turned out exactly like that by nature. If there are no grooming seminars run by your club in Spain you will find instructions in some of the breed books and there is also a pretty good video by AMP productions although the dog used mostly in the video is a solid black so consequently scissors are used rather more than you would hopefully need to with a roan.
I would add, from the pictures I have seen, the Spanish competitors do seem to present their dogs very nicely with a quite natural look.