This is a popular idea but it may not be added as a game feature as the game mechanic of filling the Pet's water bowl is a big part of getting your

levels up with your Pet, along with petting them every day. I guess you could voluntarily skip filling the bowl and have the Sprinkler do it every day but as there's currently no penalty for not filling the bowl the Sprinkler would be more of a role-playing or cosmetic choice, which is always a fun option.