Here is Boris – with the GPS device to record his tracks.

I kid you not – Boris drew what appears to be his own outline in this doodle around the park

It looks like he has even attempted to spell his name. From the middle it goes “b-o-r” and I think the next letter is an “i” and there’s definitely an “s” towards the end. Clever Dog!

This is made from video stills of Boris running around the park with the trace of a tennis ball (yellow) and the tip of his helicopter blade tail (blue)