That's so true. I cannot tell you what is wrong with him, but as you obviously love him, get him to a vet!
I do hope he is on the mend soon.
Hi you know you have to take your Cocker to a Vet ASAP if you dont he will most proberly die
it could be many things but there is no home cure for something this serious.
SO please get him into Vet now.........do not waste anymore time.
Let us know how he goes.....