a lot of times chi's ears will go up and down until about 6 mos. and then they usually stay up. i know with punky he came to me with ears taped and i took the tape off because he looked silly but his ears were up perfectly straight. and then a month later one ear drooped, then it went back up. same with my girl. her ears even bent over backward for a while. their ears are funny little things but they'll eventually stay put.