Kaleb and the dog walker

Kaleb loves that tennis ball! Kaleb is doing just fine although I do think his back left leg is bothering him.  It seems really unstable.  We walked for a just a little ways (only down 2 houses and back.)  He wanted to go further but I wasn't sure that we should.  I thought it might do him good to stretch it out a little bit but I didn't want him to overdo it.