7 cats atm and 5 are to small to get up on the bed yet. lol.
The older 2 like to occasionally sleep on my chest which makes it hard to breathe if its our gold one cause shes a BIG cat. But other then that they ignore the machine. They tend to get bored and come wake us up sometimes, and the newest one will come prance across us meowing when the alarm goes off.
Now when my daughter had a ferret she had to get her mask/hose up HIGH everyday cause he ATE the hoses. The short hose on the swift LT Mask he adored chewing on. They fit in his mouth nicely.