My "Foxton's Lady Jessica" weighed 30 pounds(13.64kg) & as a runt, was spayed before having a litter. Wonderful with absolutely everyone except for 2 guys I "had" to work with at the jail.
We got her at 9 months of age and she was part of our family for 16 years. Most springers don't see 12 years, I've read.
Glad to hear it sounds like it's getting better, John.