My 3-6 month old budgie (the pet store didn't tell us the exact age) has been with for about 3 days now. I've noticed he hasn't been drinking, but is eating just fine. I haven't seen the water level change every time I change it but I tried to feed him some apple to give him some moisture from the water in the apple, and he ate some, but I didn't want his blood sugar to spike, so I took it away. I have an automatic silo water dispenser, and I'm worried he might die of dehydration. What do I do?