Regional Jet 200 ER/LR (CRJ200)
Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument
Communication Breakdown
Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Weight And Balance; Deviation / Discrepancy - Procedural Hazardous Material Violation
General None Reported / Taken
Human Factors
Paper CLR (Cargo Load Report) was brought to the flight deck by FA (Flight Attendant) prior to pushback.  Immediately thereafter; CARGO DOOR caution reposted.  I asked FA to verify that the CLR was accurate.  She was told (which we could overhear in the cockpit) that the count had been completed with all cargo; before they opened the door to put it in. Upon arrival in ZZZ1; the Captain noticed multiple boxes of additional company cargo; including live fish which may have been transported with dry ice.  We reviewed the CLR we had received from ZZZ ground crew.  It included no notification of additional cargo in the compartment.  Therefore; we had inaccurate numbers and thereby inaccurate takeoff and landing data.Ground crew understaffing and/or lack of communication may have contributed to the situation.  Additionally; once it was time to push; we were informed by the pushback operator; that he did not have a headset.  We were not informed prior to MCD (Main Cabin Door) closure; as would be standard.  He did not; however; engage in any signals that would've indicated a change to our cargo status.  (Of course; this would have resulted in us reopening the MCD; as CLR changes cannot be made via hand signals.)Improve the selection; training; and professionalism of [contracted] ramp staff in ZZZ.  Operational problems are a daily routine and can occasionally affect safety; as in this case.
CRJ-200 First Officer reported a communication breakdown between flight crew and ground personnel resulting in transporting undeclared Dangerous Goods.