When we are out in the field, my little terrier will not play with Murphy, he gets the right raving hump if he is stalked down, pawed or if any kind of play is instigated. At home, it is a different matter, but out on the field, he just does not want to know, prefering to stalk out bunnies and go in the bushes to see what he can flush out.
Murphy on the other hand, just wants to have a bit of a chase if there is nothing else worthy around. I didn't have my camera, only my mobile phone, but by fluke managed to catch this shot, what a sahem it wasn't on a good camera though. (note the terriers teeth!)
They are best buddies really!

great piccy,one of my lurchers is like that!! he will snap and charge and has proper hissy fits,yet he will start play in the house which i wont allow!!!
here is one of him on his flying hissy fit!!

DH Ben and our terrier are exactly the same, Ben just wants to run and play but terrier wants to be left alone to hunt out rabbits in the bushes. At home he plays, at least for a while until he's had enough rough treatment.

Rocky the terrier is the same with our three hounds outside but in the house its a different matter. He can ambush the hounds and then disappear beneath the settee unharmed, it drives the hounds mad!