After switching from Science Diet

I went to wellness super mix 5 and they DO have a small bites version. Then when Uni got tired of it, right on schedule

again, I switched to core. The bits are bigger, but they are still manageable. Just one bit per bite now instead of 2 or 3. Also when she doesn't want to eat, I add a tiny bit of water and it makes it gravyish and she eats it.
I did want to ask though, ppl have said core made their pups have goopy eyes? Katie's always had goopy eyes (BAD!) but on core Uni's been getting better. weird?