The Dog Island/Hunting for Herbs

Go back to Pupsville, then go to Dr. Potan's clinic. Talk to him, and he will tell you that he knows what herds he needs to use, and he wants Blackie to find them now.

Yellow Flower
You will memorise the smell of the yellow flower, and it is a mixture of two smells. You need to find both objects first, then go to Green Meadows and sniff out the yellow flower, which will later become a sunflower if you find it for a collection. Take it back to Dr. Potan, and he will tell you that he also needs a herb called the Blue Flower, and he asked the nurse, Francis the Bichon Frise, to get it, but she should have been back by now. He asks you to find out if why she's taking so long. You need to go back outside the clinic.

Brave Fruit for Francis
When outside, you will see that three of the Victory Gang dogs, Clark, Will and Camu, are throwing tomatoes at Francis. She faints at the sight, but luckily Blackie growls at the three bullies and they leave. After all that, francis wakes up. She tells you about the victory gang dogs and their pranks, but she says that they aren't really to blame, it's her weakness. Although she is a nurse, she cannot stand the sight of blood. Apparently she was fine at first but after a while it got really bad and she faints at the sight of red! She is too nervouse to tell you the smell of the blue flower, though, but she has heard of a fruit that has the power to make dogs braver.