How do you get the pet training carear on Sims to pets for Game Boy

you have to walk pets until there is a green ! above Amy's head, then talk 2 her and she will promote u to walking pets level 2....reapeat and u will be level 3.....when u are lvl 3 (i think) u can go to the place next to the hospital and if OTIS is in there then to him if he has a green ! above him he will say u have to have a referral letter. go to Amy and to get a letter u have to find a pet 4 her. go next to the pet hospital get the pet, and lead it 2 Amy . she will give u a letter . give it to Otis and BOOM there u go,
(u also have to be certain levels in stats so go to the start menu and scroll -> to the career pg. if u have the green boxes filled in nu can be promoted to levels 2 , then 3 ,then 4 and so on)