Mr. Duke has a pinholder hiding in his tummy.  The glads are glad he does.  They stand up straight  because a pinholder is holding them up.  These glads were the ends, the tips of the stalks that I had a couple of days ago.  I just clipped the ends off and let Duke strut his stuff.  (A pinholder is metal, round or oval, flat and has sturdy metal pins to hold up the flowers.  You might want to put some putty underneath the pinholder to protect the vase from cracking.) 

Hint:  Dogs like flowers too.