"We have Glenda the Cow here, who has unfortunately been chosen to be our volunteer..."
-Dan, explaining Glenda's participation in his experiment.
Glenda was a Cow that was taken by Dr. Trayaurus and DanTDM to partake in an experiment that would "create" new spawn eggs through the Crazy Cows mod. Following the experiment, Glenda would never be seen again in any of Dan's videos.