That's the catch-22, Katrin -- a dog with a sub-par immune system should *not* be vaccinated, and almost certainly won't derive much benefit from a vaccination.
When my first Sheltie Briar Rose had dermatomyositis, my then-vet vaccinated her (to death, as it turns out) and way back then, when I asked tentatively if that was necessary, he said yes, it was, "because with her weakened immune system, she needs the protection of vaccines even more." He said that. A sure tipoff that he slept through his Immunology 101 class, the stupid twit. A sub-par (weakened, sick, etc.) immune system CAN'T MOUNT A RESPONSE to a virus when confronted with the vaccine dose of a virus, so the vaccine confers no benefit and still has enormous potential for harm.
Briar Rose died at age 9 1/2. I will never, ever buy that particular line of veterinary shite again. I now know, very well, that dermatomyositis is *not* a death sentence -- unless you continually administer modified live viruses by injection, bypassing the body's functioning immune responders (skin, lungs) and just pretty much poisoning the dog.
Yeah, I'm still bitter. It was only 17 years ago. I haven't let go of the grudge yet.
So in answer to your question: no, the sub-par immune system only confirms my "will NEVER re-vaccinate" stance, and if I am never going to re-vax, why do I give a rip what titer readings are?
Rabies = whole other story.
Last edited by connie
on Thu Feb 04, 2016 6:20 pm, edited 1 time in total.