I took all four together 1 time (by myself). Never again!!!
What a mess. The vet felt sorry for me, I am sure....forget the money, it was too much for me just dealing with four stressed out animals at the vet
(our family grew from 2 to 4 in a short amount of time. 2 had never been a problem, but 4....eeek!!!!).
So, now Ginger and Bernie go together, and a couple of months later, Kirby and Fun Kitty go. Whew!!! Easier on the budget AND easier on me!
Good luck!
And who are you adding to your family??