I have put her on a diet called Hill's weight loss food through my vets office.
just saw your post Meg...sorry you've had no reply's, there is no one on this forum unfortunately, can I suggest you repost your question on the very active DOG forum or any medical questions on our ANIMAL HEALTH forum(an excellent Vet there..)
good luck with you King Charles Spaniel, they are such beautiful dogs...-)
Oh, thank you, with my cognative issues I sometimes forget what I have posted. Thanks for the info ....