Debbie to answer your questions we have a rather large family - all ours including 20 ferals from nice to nasty ranging from 16 years to 2, we have a rescue ragdoll who had major issues and we were her last hope - she never used a grit box and was 2 and finally 16 domestics ranging from my Precious Sweetie at 15, Bert blind and 21 and a quarter a golden oldie adoption down to my Peanut who has some internal issues and is now 2.
We feed them in about 20 mins this includes the bowls in the hall, family room and at our 2 feeding stations outside all get the same food - we have one of ours awol and 2 strays.
Add in our remain doggie Jazz and its never dull.
Most of our cats are not for the feint hearted and we have worked long and hard and the ferals include our colony from our last house and all are now adapting to life inside and doing well.#
We have blind, 3 legged, cardiomyopathy and a couple of cruelty cases who we fought long and hard for and and some are even considered normal but all the ferals have a domestic or 2 and this has helped in the taming process.
\Not a rescue but we did foster for Cp for 9 years and on moving found this part of our lives removed as we are incommers and not wanted so foster ferals for the old branch and are getting a colony that now has no feeder they are a bit feisty but will live here outside safely as we are very rural with no pesky neighbours!