It was me that suggested it!  I am from Germany and there it is totally normal to give your baby fennel tea also chamomile etc.  
I have hunted high and low and couldn't find tea here so had to buy fennel seeds at the helth food shop and brew my own tea.  I used a 2/3 teaspoons for a litre of hot water and let it seep like tea.  Just remove the seeds when you feel it is strong enough - you won't hurt baby with it strong but he might just not like it vey much if it's too strong - I know some mums who add honey to sweeten it - I never did and Joey drinks it without happily.
I just used to fill a bottle with it like I would if it was water and let him drink what he wanted.  You could try feding it on a teaspoon to get it in if Blake really doesn't want it.
Another gas remedy is caraway seeds boiled up but this only give a few teaspoons and it tastes pretty yuk! 

 but it does work!!