too much food can cause impaction, as well as too much calcium. a healthy cham can go weeks without eating so, imo, i would recommend
1. discontinuing all calcium until the problem is resolved. excess cholecalciferol/d3 acummulates in the liver, and hangs there for weeks, so imo delivering d3 for the next couple of weeks not an issue
2. unnecessary additional food is likely to make the problem worse, so imo i would as recommend discontinuing any food that is not deemed necessary for delivery of some laxative agent. and even then minimally at best. the less food it gets, the sooner it is likely to clear on its own
3. if its still eating, i have had good success with a daily feeding of a single small crick gutloaded on dried prunes.
4. imo, its not normal for healthy chams to get impacted. chams usually get impacted because of some pending metabolic imbalance or other care issues. of course for now, job one is to deal with the existing problem, but imo, understanding its cause could be helpful in that. imo, i would consider it a warning flag of other likely pending issues, filling out the help form is recommended, both for a better understanding of the current issue, and for help in prevention of its re-occurrence
5. imo, plenty of time to work the problem, so imo, best taken slow, the most important thing is not to generate any compounding issues before it is resolved. imo, for the time being, i would consider hydration the most important issue. jmo