It's not necessary to change meters. If you're comfortable using the pet meter and the price of the strips isn't a problem for you, there's no reason you can't continue to use it.
The reason we suggest using a human meter instead (other than the price difference) is because all our dosing methods were developed using human meters so we're all very comfortable with seeing numbers from a human meter.....but we can help you if you want to continue with the pet meter too.
Pet meters haven't actually been around that long. When this board was started, there was no such thing as a meter for pets.