It's been super-slow for me lately, too. And I'm getting REALLY tired of the jumpy progress bars. When feeding or cleaning, they freeze, then jump way forward instantaneously, often skipping the green zone entirely so it is actually totally impossible to succeed. It doesn't matter that much to the game - it's just annoying to fail over and over again at something that should be so easy.
I also wish that it was not so difficult to speed the babies of large animals. If I actually manage to get a click on a dinosaur or whale, I feel like I should open a bottle of champagne in celebration, lol.