Re: PEBKAC
Caffeine on both
Different forms though. Tea does also contain a small amount of various theobromines (as does chocolate) which has a similar effect.
Cats and dogs can't directly metabolise theobromine so you should limit their intake of tea or chocolate. It also helps moderate TNF [1] responses and so is good in helping to suppress the inflammatory response. So, if you fall over and hurt your knee, have a big mug of strong tea :-)
[1] One of the stages in how your body manages inflammation. Modern biological treatments for various sorts of arthritis depress production of TNF. And, trust me, it works even though using the self-injector once a week is a tad painful.