They are finding out so much more about vaccinations for both pets and humans that is very alarming, but as you say, anecdotal so not all the medical and veterinary community is on board with this yet.
Interesting about the colitis. When I worked for a veterinary hospital we used to see all sorts of different problems tht would present not too long after vaccination, but at that time no one was putting together 2 and 2.
The other night I was listening to a radio program on natural health for humans, the doctor was sayiing the rates of autism in children is now 1 in every 150 children. In the '50s and '60s before vaccines were common or required the rate was 1 in 100,000. 
The thing is that without medical research then it is just anecdotal
In the case of autism in children, then there are so many more factors to be considered - better diagnosis for one
The number of children who died or were left permanently disabled from measles and other complications also has to be considered alongside the risk of autism although that is not much comfort for an individual family effected by autism, I know
Similarly, the number of dogs that contracted parvo and other nasties even a generation ago was far more than now-a-days; I remember litters of puppies being lost to the disease; it was a fact of life
Further research is definitely the way forward, and hopefully, with companies such as Intervet finally investing money into research, then slowly, things will change
Have you considered nosodes for Paddy, Denise?
