
Hi Guest,
recurring sickness is not normal for any breed of dog (or species for that matter). More Qs than As I'm afraid but what treatment from your vet cleared the problem? ( i.e. Was it diet related, medicine etc ) Did your vet include an EPI test (called TLI) in the blood panel? If so and this was clear, I'd ask for a re-test, have a faeces sample done to rule out parasitic infections and if these fail to disclose a cause enquire about an ACTH stim test (still bloods, but done separately) for Addisons.
There are a host of reasons why your dog is continually sick but thankfully many can be ruled out without invasive procedures. The best thing to do is press your vet to investigate the matter fully and if he/she can't come up with anything conclusive ask for specialist referral. Good luck, Teri :)