Many weren’t impressed by the actions of Ashley.
“This dog didn’t ask to have this done to it,” one said.
Another added: “The dog looks so sad.”
“I just. wouldn’t,” one added, while another called the four-legged pooch a “poor baby”.
The groomer behind the design, Hailey Degner, told US radio show 23WIFR the dyes were vegan and non-toxic.
But others defended the mum, who said it was Rizzo’s first Christmas with the family that loves the Jim Carey film that inspired the look.
“I looove it! IDC what anybody says! He looks great,” one said.
Another said: “HE LOOKS SO CUTE AS THE GRINCH AHHHHHH.”
Others said they wanted to do the same to their furry friends.
The clip has had more than 11.5 million views and more than 11,000 comments.