I’ve frequently heard the following advice: It’s totally okay to query multiple agents at the same agency–just be sure to query only one at a time. If Jacky rejects you, feel free to submit to Kim. If Kim rejects you, feel free to submit to Jessica.
No! No! No! If you submitted to Jacky and she thought your project had merit, but didn’t think it was for her, she would pass it on to either Kim or me. Do not continue to submit the same project to all three of us. Do your research, know as best you can what each of us represents individually, and make sure you send to the right person the first time.