Kunezikhathi eziningi esizibuza zona imibuzo ngezilwane ezifuywayo, sizibuza ukuthi izinja zingezwa futhi zicabange njengathi. Ezintweni eziningi zikhombisile ukuthi ziyefana, zihumusha imizwa yethu nokuzizwa kwethu njengabantu, kepha kusekhona ukungabaza. Ngokuqondene nokwazi ukuthi yiziphi izinja eziphuphayo, kunzima ngandlela thile, ngoba ubuchopho babo abuzange bufundwe maqondana nalokhu, kepha izinto eziningi zinganqunywa ekuziphatheni kwabo ngenkathi zilele.
Into yokuqala ukuthi wonke umuntu uke wayibona inja yakhe ikhonkotha, itetema noma ihambisa imilenze yayo ngokungathi iyagijima ngenkathi uphupha. Umhlaba abawaziyo owemisebenzi yabo yansuku zonke, ngakho-ke kuyinto ejwayelekile kubo ukuthi baphuphe ngalezi zinto abazijwayele futhi ezisemqondweni wabo omncane. Ukugijima, ukudlala noma ukuba nabaninizo kumele kube amaphupho ajwayelekile, yize kumane kuwukuqagela nje. Kepha kunezinye izinto eziningi esingazazi ngokulala kwenja.
Kwenziwa ucwaningo kwesinye isikhathi ukukhanyisa kancane ngokuziphatha kwe-canine nokubazi kancane. Akusizi ngalutho ukuthi yizilwane zasekhaya ezisondele kakhulu kumuntu. Sekuyaziwa ukuthi njengathi, izinja nazo ziyangena Isigaba se-REM o Ukuhamba Kwamehlo Okusheshayo kwephupho. Ama-Encephalograms asetshenziselwe ukuthola iqiniso lokuthi kukhona ukusebenza kobuchopho ezinjeni ngenkathi zilele, okungukuthi, ziyaphupha.
Isigaba sokulala okujulile yilapho la maphupho enzeka khona, futhi izinja zingadlula kulesi sigaba izikhathi eziningana ebusuku. Eqinisweni, bavame ukulala kancane kunabantu, futhi izigaba zabo zifushane, kepha baphupha noma kunjalo. Kutholakale nokuthi ku- imidlwane kunomsebenzi omningi yalolu hlobo, futhi kufanele kungenxa yokuthi bathola umhlaba futhi banenani elikhulu lolwazi abazolucubungula.