Another vote for Cocker spaniel. I like runts of litter in that breed too. Smaller the better. Better lap dog, better at getting into the smallest, thickest, spots after upland birds.
Cockers are definitely high on my list. However, my dad and wife both said that they are known to be biters; though neither of them have owned one and I'm sure are basing that on hearsay or an example of "1".
