Re: Hi friends- I am new here
Welcome. IMO, they are doing much better than if you had NOT done anything for them. If they have warmer and more comfortable areas available to them, I am sure they will use them vs staying out in the cold. I think you had a great idea with providing a surface other than concrete and using the heat lamp. That was inspirational! I hope someone else sees this and posts, they have links to ways to make feral cat houses to help keep them warm in the winter. Maybe you could check the Feral Forum stickies?
Do you have a TNR organization near you?
TNR is Trap, Neuter and Release to prevent the colony from growing exponentially with the food/care you are providing, which allows more to survive. If you do not TNR, eventually you will need to feed more and more food and when you have reached your financial limit the colony will go through a natural process of all of the cats getting less food and only the strongest surviving with the limited food source.
Anyhow, welcome and good luck. The ferals need every person helping them they can get.