What Are People Using For Cat And Dog Mounted Dvrs?

Was wondering what other people are using for canine or feline worn camera(s) and recorders...

Specifically has any one used the Eyenimal Petcam? (shown below)

This is a middle of the road product, compared to lower-end products like the MuttMount and the high end, like the k9 Intruder:

Of those integrators who use them, just wondering what is everyone's "go to" brand in pet wearable surveillance equipment.

Thanks.