Methods, systems, and devices for adjusting an animal wearable devices are provided in accordance with various embodiments. For example, some embodiments include a system that may include an animal wearable device, one or more straps, and one or more strap length adjustment mechanisms coupled with the one or more straps； the one or more strap length adjustment mechanisms that may be coupled with the animal wearable device. The strap length adjustment mechanism may include a variety of components such as a take-up spool and tension component(s). Some embodiments may utilize a motor coupled with the take-up spool and a microcontroller. Some embodiments include methods of utilizing the strap length adjustment mechanism(s) to adjust the fit of the animal wearable device.
