I'm very pleased to hear that Zazou is feeling more herself, that must have been a great relief to you.

I do what Lisa does, one vaccination per visit, even for my adult feral and it's nerve wracking getting him to a vet and coping with him while there. There are some cats who are fine with a bombardment of different vaccines into their immune systems and some who can't cope - even though they are perfectly healthy cats. Simka used to be unwell for a day, even with only one shot, and one of my cats was unable to cope with any vaccinations after the age of 7.