Hmmm, interesting info, but Viresco appears to be available only on your continent. I'm sure there are comparable products here, but it all comes down to time, energy, and money. As the years go by, I have less energy to work in the garden and less money for supplies and help in the garden, so a lot more has to fit into the time available, which is finite, unfortunately.
I commend you for feeding that feral colony. I acquired nine kittens from a local feral colony several years ago, and now they're fat and happy indoor-outdoor cats.
