The bull calves are growing

The two bull calves a few weeks ago.  The easiest way you can see evidence of growth is by looking at their horns.  See a photograph of them from January below. 
Recently, while examining our bison herd through binoculars, I noticed that our two bull calves appeared to have grown since we brought them here from Texas this past January.  Being around the bison frequently makes it difficult to be certain, so I made a comparison between photographs of them I took in January and photographs I took this month.  Sure enough, there has been some growth.  

The two bull calves in January.  In this photograph their horns are shorter than their ears. 

Also, I was able to finally get that warning sign posted on our fence.  Hopefully this will help to deter people from attempting to approach the bison.