I am definitely quite disappointed that there is only one color for each type of rodent. At least we could have had white, gray, and brown options, to vary it up a bit. That seems like such a logical and basic requirement that has been ignored :(
For the most part, I have been content with the Sims 4. It has kept me generally entertained throughout its course. But one of my biggest complaints always seems to come back to colors. Trying to match furniture. Matching limited windows to limited doors. Having only one hair highlight option per hair color. Very limited carpet colors. Certain shrubs and flowers with only one available color. And now no color options for our furry friends. I feel like so many of my houses and sims use the same items because there are so many color combos I don't like...or there is only one color option to choose from for an item, period...