I believe the old saying is "feed a cold and starve a fever" so get him a fresh pizza pie with chicken soup combined in it. He'll be back to normal in a jiffy.

That’s…a choice ..lol. I suppose the collagen could be good.
This actually makes me think of dog treats. We buy this subscription box for the d.o.g. We call it “the little box of horrors “. Chicken and duck feet, beef esophagus, duck heads (she has to eat those outside), boar ears- all the good stuff.