I dont know about birds, but cats definately can. Many animals with good hearing can hear it. Humans have very poor hearing, when compared to most other animals. Humans can only hear noises that are at least 20000 hz, while dog whistles operate in the 16000 to 20000hz range.
Articles Tagged: Bird Care
Our home is invested with fleas and we want the gone for the dog’s and our own sake. We have eight birds (cocketiels, parakeets, finches). How can we get rid of the fleas without harming the birds or ourselves? We don’t have a lot of money right now so something that’s not too expensive.