Making them muddy and dirty can be such fun.
Nice looking work on the Mutt Chris. For the most part a very clean build.
One little thing that caught my eye. On the tow launcher where the 2 halfs meet, the seam is still visible. This is a fairly common problem when two parts are used to form a cylinder (such as 2-part gun barrels). What I usually do is run a bead of CA glue right along the seam and then shortly after it has dried, sand the seam until the line is completely gone. Don't oversand it though becasue it will make flat spots on it.
You had so much fun with the mud ... when are you going to give pastel chalks a try. They are great for blending in the mud with a dirty vehicle and are very easy to use.
All in all a nice build ... thanks for sharing and keep up the great work Chris.
Happy Modelling and God Bless
Robert