Not really, since ultrasonics have little predictable effect on animals, it's just another loud sound. Tried for a while to keep the neighbor's cats from using my property as their toilet. He had 17 at one point, before I convinced him to cut the population some, since they were adopted strays. I tried several circuits, frequency, and pulse timings, but never got great results, still had a few that ignored it. Fortunately, his lady friend gave him the boot, and got rid of the cats. The last circuit I built, about four years is still working, but I still get a cat from across the street. Still think it was a good idea though. I've got 4 piezo tweeters, each is sent the audio signal sequentially, about 15 second delay before the next, sound lasts about 5 seconds. I intended for around 22kHz, sound it would be heard, but used 555 timers, so kind of drifts do to temperature. Been meaning to redo this with a microcontroller, since the speakers are already install across the front of my house, but isn't a big enough success to spend the time on.