Can ear infections be contagious?

Question: 

I think my bichon has an infection.  Can she have “caught” it from my bulldog?  I have Vet-Betagin from when my bulldog had an ear infection in my bull dog. Can I use the Vet-Betagin on the bichon?

Answer: 

The chance of your Bichon getting an ear infection from your Bulldog is highly unlikely. Please have your Bichon’s ears checked by a veterinarian before using the Vet-Betagin. The type of ear infection needs to be characterized by a veterinarian and it also needs to be established that your Bichon has intact ear drums before starting any topical medication.