The following is a run on sentence i like to with my dog in the field got pretty coat?

That's a great start! Here are a few ways to fix the run-on sentence and make it more clear:

Option 1: Adding a comma and conjunction:

* I like to walk with my dog in the field, and he's got a pretty coat.

Option 2: Creating two separate sentences:

* I like to walk with my dog in the field. He's got a pretty coat.

Option 3: Using a semicolon:

* I like to walk with my dog in the field; he's got a pretty coat.

Option 4: Using a colon:

* I like to walk with my dog in the field: he's got a pretty coat.

Which option you choose depends on the emphasis you want to give and the overall tone of your writing.