You have already been with a therapist who found Rufus to be frivolous and ordered him to leave. So, you could use the test images to show them to the broken Bozo and see how the therapist should respond to Rufus. Switch the control to the green stern.
Go to a pub. Talk to the bartender. Break off the advertising leaflet from the wall at the bar. Look at the picture above the counter, unfortunately, the bartender does not think of giving it to you. Click on nucleic acid (green vial over the bartender's head). It turns out that it costs 6 gold coins. Talk to your customers - supplier, fruit seller, and plumber. Take cups from their tables. Try filling them at the bar, but unfortunately - both hormones, hair growth medium and mushroom extract are currently banned ingredients of drinks. So, you have to get them on your own. For the time being, pour washing into each mug (pipe on the left side of the bar).
Go to the witch location and talk to the witch about mushrooms (click on the witch leaflet). Again, hook up the witch and tell her that she certainly has the mushroom. Indeed... Break that mushroom and throw it into one of the mugs. Switch to the red Rufus and go to the house of Mr. and Mrs. Bozo, from where you can take the container with mother's milk lying on the worktop. Go before entering the rebel camp and look inside the tank and proceed with your Goodbye Deponia adventure.
Open the cabinet and take the box with lunch, unpack it in your inventory - you will find a bottle with hormones. Give the hormones and mother's milk to the green Rufus, who will throw it into the other two mugs. Give drinks to guests in a pub: a mushroom plumber, a drink with hormones - a fruit seller, and the one with hair growth - a supplier. Return to the pub and take the picture.