We think he's around 2-3 years old. We also have no knowledge to what they use to feed him, but seeing how he will starve himself if I try to feed him anything other than small bird seed (I've tried all different kinds of pellets and fruits/vegetables, only thing he will eat slightly is spinach) I'm gonna assume they only fed him seeds
It can be difficult to convert , sometimes much longer, but keep trying. Great job in getting a little spinach in him! It took me 2 years to get an old quaker eating romain lettuce! Now she truly loves it! Tho she did start eating other veggies for me sooner.
Nutrition and immunity and health are so linked.
Keep trying different ways..some things taken too easier might be thawed frozen peas, corn cut off the cob, yellow/orange/red bell pepper offer the seeds inside as well. Cooked and mashed sweet potatoes served warm. Take a broccoli crown snd sprinkle seeds in it. Stuff things in cage bars..this can lead to nibbles or use veggies as a perch. Offer grated, chopped or in big pieces. A little boiled egg or scrambled egg.. Eat the veggies in front of them. You will have a lot of waste at first. But once they start trying a few things and learning they are actually food they get better and trying more things! Mine are much better at exploring new foods if I offer out of the cage, I serve on flat dishes on top of cage and I use them like foraging hanging thrm stuffed into seagrass mats.
Im glad you are going to seek a second opinion. Wishing you success in finding out what's going on. Keep us updated.
And would love to just see a picture of your rescue!