Released to the public in January, Frisbees took off this year after toy company Wham-O bought the initial flying disk concept (dubbed thePluto Platter) from inventor Walter Frederick Morrison in the late 1940s. Considered a fad that wouldsoon die out, more than 100 million Frisbees have be...
so you can see just how much energy Sparky is expending when he runs around the house in circles. It’ll also chart activity over 90-day periods. So if you suspect your pet isn’t feeling well, you can verify your suspicion by looking at his activity levels. ...