I know Delboy but the other one in my opinion is even worse!! We found that Colombovac does work but we have to do everything religiously as non of the vaccines help if you vaccinate them once they already have PMV. One of my mates lost his finger after he accidently self injected himself with the nobilis vac. I have heard of problems when birds have been vaccinated and then they start showing signs of PMV, our vet said that it was because they had it when we vaccinated them. I dont think Colombovac has a bad name, but you may have had diferent experiences. Cheers.