HURT BABY DEER!! HELP!!!?

am at my cousins house and we saw a baby deer in there driveway.(they live in the country) the baby hope like a bunny because its front legs it cant use. we dont know what happened but it keeps its front legs bent and hops. it can move pretty fast but it cant walk right and is really valnurable to any predator. its mom whatches it and takes care of it. we called a wildlife center and they said they cant help unless it is seperated from its mom or something. how can i help this poor baby deer?? thamks a lot and any info will help! my coiusins have a busy street above there long driveway, maybe that could be helpful!