Yes, your pet needs to keep it's  E-collar on for as long as recommended by your veterinarian. E-collars help protect a surgical site or an area of focus while it is healing. 

Typically, pets will get used to wearing their E-collar over time. However, there are alternatives available such as the BiteNot Collar or donut type collars. These alternative collars should be approved by your veterinarian prior to use.