The long awaited moment had arrived, a hybrid of interest by spectators of the program's future experiences all those years ago before the hiatus.

Groo took the injection well, but the cow DNA seemed to take effect a lot quicker than the roo has expected. His feral lower half was shifting fast, a tingling and swelling as his lower belly grow.
It was fairly obvious the udder was forming... meanwhile, the legs and tail shifted, his pelt pattern developing patchy splotchs.
Higher up on the head, only minor changes had taken place- his muzzle had changed shape and small horns had developed. This seemed to be all.. except the udder, it was still swelling, seemingly taking over his former genitalia.
Groo blushed as he looked down at the udder as the transformative experiment finished. the plump fleshy of udder much bigger than he expected.
The transformative was only temporary, but when the pill for this form (as per the program's processes) was eventually created- he'd certainly take them... I mean free milk? Can't pass that up.
But until the form wore off, he'd need to find someone to milk him, he couldn't quite reach over the plump udder to do it himself.

To see previous experiments within the Groo-hybrid program click here

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Groo Mooroo is me

Artist is  gaia1234

Artist original submission: https://www.furaffinity.net/view/25731239