I wanted to post congratulations yesterday, but was at work and then had my hands full of kittens so couldn't. Anyway, congratulations on some success - it must have been a wonderful feeling to see normal poop after months of mess. I agree with other posters that, as with all creatures, there will be times it works and times it doesn't seem to work.

I've used Metamucil for years, but never in capsule form. I've sprinkled it over dry food, which is not the best way but it helps a little. It works best in wet food because you can put more into it. After a lot of trial and error, I figured out the best way to stop it making the food hard. Mix some boiling water with the food so that it is rather sloppy, then sprinkle on the Metamucil and mix it in very thoroughly, let it sit for a minute while it hardens up the food, then mix in more hot water until it's nice and moist again, wait another half-minute to make sure that it hasn't hardened up the food again and if it has, add a little more water. I know it's a rigmarole but it's worked well for me with both my Artful Dodger and Ginger. They wouldn't eat the pumpkin pie filling so you are lucky, and so is Lucas, that he likes it.

Good luck! This is the time of a cat's life that really sorts out the true cat lovers from the ones who like them more as accessories.