So, did Colgate stop using Dr. Rabbit because of YouTube Poops? His last animated appearance was in 2009, right as YouTube Poops hit their peak of popularity. I did find a Colgate-brand PDF book (AKA not poopable) with Doctor Rabbit that supposedly came out in 2016 (when the meme spotlight was lifted away from the character and YTP as a whole) but even then I have no clue if that's actually when it came out and not just Colgate redistributing (they have a lot of the 90s Dr. Rabbit stuff on their site)
I think I was watching 90's or 80's shows as kid and that's why I have nostalgia like this.