Like I said, it might look unintuitive at first, but what you want to do is split the signal before the Brown Dog input and send that to the 00Funk envelope. A jack splitter on the Brown Dog input might look wrong, but remember at the end of the day they are just electrical connections and it makes no difference whether you split the signal a few inches before the input or directly at the input. It's not like the jack splitter only allows signal to flow in one direction. Here's a pic!
You can use the splitter earlier in the chain if you have other pedals before the Brown Dog, in which case put the splitter on the input of the first pedal in your chain. Also, if you have a tuner with dual outputs (eg Boss TU-2, Ibanez LU-20) you can use that as your signal splitter which looks much neater.