Every once in a while I see Angel carry two tennis balls in her mouth and wondered how she did it, now I know....

We pick up one tennis ball and carry it over to the other, we put the one we are carrying down next to the one already on the floor. We then procede to step on one so it doesn't move and pick up both at the same time by grabbing in the middle of two and pick them up.

( Yeah, she's just a dumb dog......)