My rooster is walking like he’s drunk and crowing like he needs to cough.

[Wyorp Rock]

Usually, you won't see worms in the poop unless there's a heavy infestation. The worm eggs are too small to see with a naked eye.

You can definitely give him vitamin E that you buy at your local pharmacy or store. You'll find the B-Complex there too I'm sure.

If you have canned fish like tuna or mackerel, he may enjoy a little of that each day too. Makes a nice "treat" and provides extra protein and nutrients. Just thinking of other things that he might like.