He has managed to get a sparrow, and has already partially tamed it. His means of taming is simple, for already the spiders have diminished.
So that means that after seeing how Renfield is making his pets eat eachother in the order of the food chain, then it's possible that he will be supervised with the sparrow since the bird could be helping Renfield in his recovery right Seward? Right?
Nonetheless, this entry is very important since we see the (very unprofessional) progression of Seward with his biased treatment towards Renfield. It might be entirely unintentional, but there is a critical reading of Seward as a doctor within the asylum system of the time, and how its entire structure allowed the abuse of vulnerable people at the hands of doctors who saw them more as a means to "understand" the human psyche instead of patients that needed help with their mental illnesses.
Even thought the narrative around Renfield paints him as the "ominous yet dangerous insane man" arquetype, all of his actions are seen through the eyes of Seward, which makes Renfield a more sympathetic character because he is textually at the mercy of a man who doesn't has his recovery in mind.
