[header] How to shoulder train a pet rat [title] Let your rat get used to his new home. [step] When you first get a pet rat, give him at least a week to get used to his new surroundings (and to you). Your rat needs to feel comfortable and safe before he will respond to training; rushing into this will not produce the results you're hoping for. 
[substeps] Sit near your rat's cage for 5 minutes at a time, several times a day and talk softly to him. This will help him get used to your presence and voice.