Girlfriend missdialed Purina Pet Foods, and dialed 1 800 779 8864, it tells you to dial
10-15-15-8000, Quick Google shows people being charged anywhere from $4.95- $20.
Do not dial the 10 15 15 8000, you will be charged, listen to the recording on the 800 number, it is safe.
Any experiences with this Number?

800 numbers are toll free. Were you charged for dialing the number?

The 800 Number is free, but it tells you to call the 10 15 15 8000, dialing that will cost you.

There you go. I see now. My guess is that the phone provider will end this scam soon - and cancel their 800 #.